Caliburn Vape Reviews: G4 Pro, G4 Classic, G4, G3 Pro, G3, Explorer Tested

I review Caliburn devices for one reason. The lineup keeps changing, yet the same daily problems keep showing up. Leaks, weak batteries, awkward airflow, and screens that look good only in photos.

We ran these Caliburn models through the same routine. Short sessions during commutes. Longer sessions at home. Plenty of pod refills, coil swaps, and charge cycles.

Marcus Reed pushed harder sessions and warmer output. Jamal Davis lived with each device in pockets and bags. Dr. Adrian Walker reviewed wording around risk and labeling.

Product Overview

Testing Team Takeaways

I kept coming back to the same Caliburn pattern. Flavor comes through fast. The draw stays clean when pods fit tight. Then, after a few refills, condensation starts talking. I kept wiping mouthpieces and checking the pod base. The newer GPP-style pods felt calmer. When a device felt “wet,” I wrote it down. “This one needs one extra wipe per day,” kept showing up in my notes.

Marcus Reed treated the lineup like a stress test. Longer pulls. Higher output. More chain sessions. Heat behavior became his early filter. He kept saying “If it warms up fast, it better stay stable,” then he watched how flavor shifted. When pods ran hotter, he noticed sweetness flatten. When airflow got tight from condensation, he noticed it first.

Jamal Davis cared about friction points. Pocket carry. Car cup holders. Gym bag chaos. He kept describing mouthpiece feel and button behavior. He wrote “This kind of device disappears in a pocket,” for the A3S and AZ3. He wrote “This one prints a rectangle through shorts,” for the GK3. He also flagged charge-port placement when lint got near the opening.

Caliburn Vape Comparison Chart

What We Tested and How We Tested It

We scored each Caliburn device with the same adult-use routine. Pod fill was tracked by number of refills, not by “days.” Each pod got wiped at the same points. Mouthpiece check happened before the first session, then again after pocket time. The goal stayed simple. Find what stays clean under normal use.

Flavor accuracy came from repeat liquids in multiple devices. We used one fruit blend, one cooling blend, one candy blend, one bakery blend, one mint, then one tobacco-style profile. Intensity got judged at the start of a pod, then again after the coil warmed up through repeated sessions.

Throat hit stayed a subjective note. No medical claims. We wrote down “sharp,” “soft,” “dry,” or “rounded.”

Vapor production was checked in two ways. Short pulls for quick errands. Longer pulls for couch sessions. Airflow smoothness got judged by draw resistance, whistle, and the way airflow changed when the pod collected condensation.

Battery life was tracked by sessions per charge. Charge behavior included heat at the port, charge speed feel, and whether output sagged near low battery. Leak and condensation control came from pod base checks, gurgle events, and how often a wipe became necessary.

Build quality got judged by fit, door feel, pod click-in, and how the body handled pocket abuse. Ease of use included refill access, coil swaps, button logic, screen clarity, and how often we had to “think” to use it. Reliability got judged by misfires, random cutoffs, and pod connection sensitivity.

Caliburn Vape Testing Experience

Caliburn G4 Pro

Our Testing Experience

Touchscreen control changed the rhythm of daily use. On the first day, I kept tapping the screen like a phone. Then the habit settled. In a work break, I bumped wattage down without thinking. A few sessions later, I pushed it up for a warmer pull. That quick control made the device feel more like a tool, less like a toy. UWELL positions the G4 Pro as a touchscreen pod with a larger battery, and that matched what we felt in rotation.

Marcus treated it like a small “almost-mod.” He ran a warmer pod setup, then stayed there for longer chains. Heat stayed present, yet it felt predictable. He kept rubbing the body near the pod, checking for a hot spot. None showed up in our sessions. He said “If it’s going to run warm, it needs to stay even,” then he stopped complaining.

Jamal carried it through a full commuter loop. The shape took more pocket space than A-series devices. It still rode fine in a jacket pocket. In light shorts, the weight became noticeable. The touchscreen also pulled fingerprints fast. Jamal said “This kind of screen looks nice, then it looks used,” and he wasn’t wrong.

Draw Experience & Flavors

We treated the G4 Pro like a “flavor lab.” The pod platform handled multiple liquids without the draw turning messy. The draw felt smoother when airflow sat mid-open. With airflow too tight, sweetness jumped forward, then throat hit sharpened.

Flavor 1: Strawberry Watermelon Ice. On the first pull, the strawberry sat on the front of the tongue. Watermelon filled the sides next. Cooling arrived last, right at the throat. I felt a crisp edge on higher output. At lower output, the blend turned rounder. Marcus wrote “Ice feels cleaner when it’s warm enough,” which sounded odd until we repeated it.

Flavor 2: Blue Razz Lemonade. The inhale carried candy-blue notes first. A tart lemon snap hit mid-mouth. With airflow more open, the lemonade part felt brighter. With airflow tight, the candy took over. Jamal said “That kind of tart makes me pull slower,” since quick pulls made it feel sharp.

Flavor 3: Creamy Vanilla Custard. This one exposed coil behavior. The first few pulls tasted thick, like warm sugar. Then, after repeated sessions, the sweetness got slightly “toasted.” I kept the wattage lower to keep it soft. Marcus pushed it higher and said “Now it tastes like the edge of a bakery tray,” which was his way of saying it browned.

Flavor 4: Mint Spearmint. The mouth feel stayed the story here. A clean mint opened up the roof of the mouth. The exhale stayed dry, not candy-sweet. On higher output, mint turned a little aggressive. On lower output, it stayed smooth. Jamal liked it for quick outdoor sessions. He said “This is pocket-gum mint, not toothpaste,” and that matched our notes.

Flavor 5: Mango Peach. Mango hit first, then peach brought a soft fuzziness. The blend stayed full even on shorter pulls. I noticed that the G4 Pro held the middle notes better than older Caliburns. With airflow more open, mango got brighter. With airflow tight, peach sweetness dominated.

Flavor 6: Classic Tobacco. We used a mild tobacco-style liquid. The draw felt dryer by nature. The G4 Pro kept it from tasting “thin.” Still, throat hit felt more noticeable.

Best draw experience picks from this set: Strawberry Watermelon Ice for clean layering. Mint Spearmint for a steady, smooth mouth feel.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $25\text{–}$40
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw plus button control
• Battery capacity: 1800mAh
• Charging port: USB-C
• Estimated charge time: varies by charger, rated fast-charge style appears in listings
• Coil type: integrated mesh pods (GPP/G3 compatible range)
• Pod capacity: commonly listed at 3mL with GPP pods
• Airflow style: adjustable control
• Output: up to 35W shown in retailer listings
• Leak resistance features: newer pod sealing style noted in UWELL GPP platform language
• Build materials: metal alloy body in most listings
• Dimensions and weight: varies by market listing
• Included accessories: device, pods, cable, paperwork (varies)
• Safety features: standard overcharge style protections typically listed by retailers
• Shipping: varies by retailer
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Strawberry Watermelon Ice, Blue Razz Lemonade, Vanilla Custard, Mint Spearmint, Mango Peach, Classic Tobacco

Review Score

Caliburn G4 Classic

Our Testing Experience

The G4 Classic felt like the “no drama” option. The device setup happened fast. I filled a pod, clicked it in, then moved on. The airflow control stayed easier to live with than pod-flip systems. The first day felt boring in a good way. Nothing rattled. Nothing surprised. That boring feel became the point.

Marcus ran it harder than I expected. He pushed warmer output and used thicker liquids. Heat stayed manageable. The body warmed, yet it did not spike. He said “It’s not flashy, but it holds its lane,” and that became our shared note. Published specs and summaries place the Classic at 35W max with a 1400mAh battery, and our day-to-day carry matched that “mid-high” power feel.

Jamal liked the size balance. Pocket carry stayed easier than the G4 Pro. The device did not feel fragile in a bag. The e-liquid window helped his routine. He said “If I can see it, I don’t overthink it,” and he checked levels before leaving home. The airflow control felt recessed enough that it did not move by accident.

Draw Experience & Flavors

We tested the G4 Classic with the same liquid set, yet the draw feel shifted slightly. The Classic delivered a steadier pull on mid airflow. It felt less “twitchy” than high-control devices. That became helpful when switching flavors quickly.

Flavor 1: Grape Ice. The inhale started with dark candy grape. Cooling came through later. On a tighter airflow, grape became syrupy. On a looser airflow, the grape felt brighter and less sticky. Marcus said “Grape can taste like perfume if it runs wrong,” then he admitted this one stayed clean.

Flavor 2: Pineapple Coconut. The mouth feel mattered. Pineapple hit first with a sharp edge. Coconut arrived as a soft cream, mostly on the exhale. When wattage sat too high, pineapple turned spiky. When it sat moderate, the blend felt like a smooth drink profile.

Flavor 3: Coffee Cream. This flavor exposed coil warmth. On the first pulls, it tasted like mild roasted notes with sweet cream. After several sessions, the coffee note deepened. Jamal noticed “It tastes better after it’s been warmed up,” and that lined up with our notes. With airflow too open, the coffee felt thin. With airflow mid-tight, it felt thicker.

Flavor 4: Peppermint. The draw stayed crisp and fast. The cooling stayed forward. The Classic kept the mint from tasting “wet.” I still wiped condensation, yet the mouthpiece felt cleaner than older pod platforms.

Flavor 5: Apple Sour. The inhale carried green apple bite. Mid-mouth delivered a sour tingle. The exhale turned sweet. A tighter airflow made sour feel sharper. A looser airflow softened it. Marcus preferred it warmer, since it gave a fuller apple body.

Flavor 6: Mild Tobacco with caramel note. The caramel came first. Tobacco sat underneath. The Classic kept it steady with fewer harsh spikes.

Best draw experience picks: Pineapple Coconut for the most complete mouth feel. Coffee Cream for the smooth “warm-up” effect.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $20\text{–}$35
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw/button (varies by pod and settings)
• Battery capacity: 1400mAh
• Charging port: USB-C, 2A listed in summaries
• Pod capacity: 3mL
• Coil type: FeCrAl mesh pods (GPP)
• Airflow style: dual airflow system
• Output: up to 35W
• Build materials: listed PC, aluminum alloy, PCTG
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Grape Ice, Pineapple Coconut, Coffee Cream, Peppermint, Apple Sour, Tobacco-Caramel

Review Score

Caliburn G4

Our Testing Experience

The G4 felt like the default pick for many adults. It has the screen and output range, yet it avoids the touchscreen jump. My routine with it stayed simple. Fill the pod. Set airflow. Adjust wattage once, then forget it. That “set and forget” feel mattered in daily use.

Marcus used it as a baseline against the Classic and Pro. He pushed it near the top of its range, then watched whether the pod stayed consistent. When he chain-vaped, sweetness still flattened a bit. That is normal under heat. He still said “This stays stable enough,” which is his version of praise. Retail listings describe the G4 at 1300mAh with a 3mL pod, and that matches the way it behaved during longer days.

Jamal liked the size. It carried more easily than the Pro. The screen stayed readable outdoors. In a bag, it did not fire by accident in our setup. He also liked the pod availability. Buying pods felt easier for this platform.

Draw Experience & Flavors

We used the G4 with the same flavor set, yet the draw feel leaned slightly smoother than older G3-style airflow. The mid-open airflow gave the best balance. Tight airflow made throat hit feel sharper. Wide airflow softened it, yet it lowered flavor punch.

Flavor 1: Watermelon Mint. The first inhale felt juicy and bright. Mint followed right behind, cooling the back of the throat. When wattage sat a little higher, mint got louder. When wattage sat moderate, watermelon stayed the lead.

Flavor 2: Peach Ice Tea. The mouth feel felt “thin” at low power, then richer at mid power. Peach arrived on the sides of the tongue. Tea note sat underneath as dryness. Jamal said “It feels like that kind of sweet tea you sip fast,” because the exhale stayed clean and quick.

Flavor 3: Blueberry Cream. Blueberry came first. Cream came late. On tight airflow, cream turned heavy. On looser airflow, blueberry became brighter. I noticed that the G4 kept the cream from tasting oily, which can happen on some coils.

Flavor 4: Cinnamon donut. This one can scorch coils if pushed. I kept wattage moderate. The inhale felt like warm cinnamon sugar. The exhale carried dough. Marcus pushed it warmer and said “This is where burnt shows up fast,” then he backed off after a few pulls.

Flavor 5: Menthol tobacco. The menthol cut through the dryness of tobacco. The throat feel sharpened quickly if airflow stayed tight. I used it as a “reset” flavor between sweeter liquids.

Flavor 6: Lemon lime soda. Sharp citrus hit first, then sweet fizz impression followed. The G4 made the citrus feel crisp without turning it metallic. On higher output, sour hit harder.

Best draw experience picks: Peach Ice Tea for balanced mouth feel. Lemon lime soda for crisp flavor edges.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $20\text{–}$30
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw/button (common listing)
• Battery capacity: 1300mAh
• Output: adjustable 5–35W
• Pod capacity: 3mL
• Pod type: GPP series pods, side fill
• Coil resistance range: listings often show 0.4–0.9Ω support
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Watermelon Mint, Peach Ice Tea, Blueberry Cream, Cinnamon Donut, Menthol Tobacco, Lemon Lime Soda

Review Score

Caliburn G3 Pro

Our Testing Experience

The G3 Pro sits in a spot where MTL habits and RDL curiosity meet. I used it like a bridge device. In one session, I kept airflow tighter with a higher-nic liquid. In another session, I opened airflow and moved to a lower-nic freebase. That switching revealed what the G3 Pro does well. It handles changes without feeling confused.

I noticed the screen immediately. It gives more glance data than older OLED setups. Battery behavior stayed consistent for its class. Vaping360 and other summaries describe the G3 Pro at 1000mAh with a 3mL pod option, plus a 0.4Ω pod for RDL, and those details line up with how it performed in our rotation.

Marcus treated it like a “compact warm puller.” He used the 0.4Ω style pod behavior to chase a denser pull. He kept saying “This one actually wants power,” and he is right. When the pod ran warmer, flavor stayed thick. When it ran too hot, sweetness fell flat, then throat hit got sharper. He adjusted down quickly.

Jamal liked it, yet he did not love the extra attention it demanded. He carried it in a pocket and noticed button interactions more than with the G4 Classic. He wrote “I don’t want a menu when I’m walking,” and that is his bias. When he settled settings at home, he enjoyed it more.

Draw Experience & Flavors

We picked liquids that show differences between MTL and RDL behavior. The G3 Pro’s draw felt cleanest when airflow sat just slightly open. Tight airflow made sweetness crowd the mouth. Wide airflow softened everything.

Flavor 1: Raspberry gummy. Inhale delivered bright raspberry. Mid-mouth felt like candy gelatin. Exhale stayed sweet. On warmer settings, gummy note got thicker. On cooler settings, the raspberry note felt sharper. Marcus said “It turns into candy syrup if you push it,” then he lowered output to bring back edge.

Flavor 2: Orange creamsicle. Orange peel note hit first. Cream followed late, coating the mouth. When airflow opened, the orange felt brighter. When airflow tightened, cream thickened and took over. I liked it mid-open for balance.

Flavor 3: Cola ice. Cola spice notes hit mid-mouth. Cooling landed at the throat. On hotter pulls, cola turned darker. On cooler pulls, it tasted more like soda sweetness. Jamal said “That kind of cola makes me want a short pull,” because longer pulls brought more spice.

Flavor 4: Honeydew melon. This flavor can taste watery on weak coils. The G3 Pro kept it full. The inhale tasted like fresh melon. The exhale carried a soft sweetness. With airflow too open, it thinned out.

Flavor 5: Caramel latte. The caramel note hit first. Coffee sat under it. The G3 Pro made it feel warm and dense when output rose. Then coil heat started pushing the caramel into “burnt sugar” territory. I backed down and it recovered. Marcus laughed and said “Dessert flavors punish you fast,” which felt true.

Flavor 6: Smooth mint. This mint felt less sharp than peppermint. It coated the tongue with cool sweetness. On tight airflow, it felt too intense. On open airflow, it stayed clean.

Best draw experience picks: Orange creamsicle for full-mouth layering. Honeydew melon for a surprisingly rich “fresh” mouth feel.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $25\text{–}$35
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw plus button firing listed in summaries
• Battery capacity: 1000mAh
• Pod capacity: 3mL (common listing)
• Output: 5–35W
• Airflow style: fine tuning airflow control
• Pod compatibility: Caliburn G3 pods
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Raspberry Gummy, Orange Creamsicle, Cola Ice, Honeydew Melon, Caramel Latte, Smooth Mint

Review Score

Caliburn G3

Our Testing Experience

The G3 felt like a simple daily pod device that still gives real data. I liked the small OLED screen. It told me battery and power without drama. The device also stayed lighter than the G4 generation. That made it easier to carry, then forget.

I ran the G3 mostly in MTL-friendly settings. The pod fit felt tight. The device stayed quiet. When I pushed it toward warmer pulls, I noticed the limit sooner than with G4 units. Still, it did not fall apart. Third-party summaries describe the G3 at around a 900mAh class battery with a 2.5mL capacity (often region-dependent), and that matches the “half step below G4” behavior we saw.

Marcus liked the stability more than the raw power. He did not chase max output here. He chased consistency. He said “This stays even across the day,” then he stopped picking at it. He still noticed that dessert flavors lost depth faster when the battery dropped.

Jamal liked the pocket feel. It carried better than the GK3. He also liked that it did not demand attention. He wrote “I can throw it in a pocket and forget about it,” which is basically his highest grade. He did notice occasional condensation at the mouthpiece after long pocket time.

Draw Experience & Flavors

The G3’s draw felt smooth and steady. It leaned slightly tighter than the G4 platform in our setup. That helped nicotine salt style liquids feel controlled. It also made some bright fruits feel intense.

Flavor 1: Strawberry banana. Strawberry landed first. Banana followed as a soft creamy note. With tighter airflow, banana felt thicker. With slightly looser airflow, strawberry popped more.

Flavor 2: Blueberry pomegranate. Blueberry hit mid-mouth. Pomegranate brought tart bite near the sides. On longer pulls, tart got sharper. I switched to shorter pulls and it felt cleaner.

Flavor 3: Sweet mint. Not a harsh mint. It tasted like mint candy. The G3 made it smooth, yet it also made it feel “full” in the mouth. Jamal said “This kind of mint lingers in my mouth,” and that is exactly what it did.

Flavor 4: Vanilla wafer. Light bakery profile. Inhale tasted like vanilla sugar. Exhale carried a dry cookie note. Marcus pushed it warmer and said “This one gets toasted fast,” so we kept it moderate.

Flavor 5: Pineapple ice. Pineapple sat forward. Cooling hit the throat late. On the G3, the cooling felt sharper, likely due to tighter airflow. I opened airflow slightly and it mellowed.

Flavor 6: Light tobacco. Dry, mild, slightly nutty. The G3 kept it steady. Throat feel stayed noticeable.

Best draw experience picks: Strawberry banana for smooth blending. Vanilla wafer for a clean, dry exhale.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $20\text{–}$30
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw/button in common G3 setups
• Battery capacity: listed as 900mAh on some UWELL G3 platform devices and reviews
• Pod capacity: commonly 2.5mL, with some regional variants
• Pod platform: G3 / GPP family compatibility is widely referenced
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Strawberry Banana, Blueberry Pomegranate, Sweet Mint, Vanilla Wafer, Pineapple Ice, Light Tobacco

Review Score

Caliburn Explorer

Our Testing Experience

The Explorer is the odd one in this lineup. It tries to solve a real habit. Adults get bored of one flavor. They also hate swapping pods mid-day. The dual-chamber approach sounded gimmicky. Then it started making sense. I filled one side with a bright fruit. I filled the other with a mint. Then I switched by mode instead of by pod.

In practice, it added parts and added cleanup. I had to watch both fill ports. I had to track condensation across a larger pod footprint. Still, the concept worked. UWELL and major retailers describe the Explorer with a 1000mAh battery and a 4mL total pod system (split), and that matches the way it reduced refills during long sessions.

Marcus loved the “combine” idea. He set it to hit both sides and made a blended draw. Then he pushed longer pulls and watched for heat. He said “This is fun, but it’s more to maintain,” and that stayed true. When coils warmed, the blend sometimes turned muddy. He then switched back to single-side hits.

Jamal liked it at home, not in motion. Carrying a bigger pod felt awkward. He also worried about pocket lint near the larger pod seams. He said “I don’t want two fill plugs in my pocket life,” which is fair. At a desk, it felt easier.

Draw Experience & Flavors

We tested flavors in pairs, since the device invites that behavior. The draw experience changed depending on whether we used one chamber, alternated, or combined.

Flavor 1: Mango on one side, cold mint on the other. Mango alone felt juicy and soft. Mint alone felt sharp and quick. When combined, the inhale started mango. Then mint cut the back of the throat. The mouth feel became “bright.” Marcus said “This is like mixing juice at a bar,” and he kept using it.

Flavor 2: Strawberry candy paired with lemon lime. Strawberry alone tasted thick and sweet. Lemon lime alone tasted sharp. Alternating puffs kept the palate awake. Combined pulls made the strawberry feel less heavy, yet the lemon sometimes dominated the exhale.

Flavor 3: Vanilla custard paired with espresso. Custard alone felt heavy and coating. Espresso alone felt dry and roasted. Alternating puffs felt like dessert, then coffee. Combined pulls sometimes tasted like burnt sugar if wattage ran high. I lowered output and it became smoother.

Flavor 4: Watermelon ice paired with grape ice. This pairing tested cooling intensity. Watermelon felt cleaner. Grape felt darker. Combined pulls made cooling feel stronger, and throat sensation sharpened. Jamal said “That kind of cold makes me stop after two pulls,” which is a real adult-use behavior.

Flavor 5: Tobacco paired with peppermint. Tobacco alone felt dry and steady. Peppermint alone felt crisp. Combined pulls made the tobacco feel lighter. It also made the throat feel sharper for me.

Flavor 6: Peach tea paired with honeydew. Peach tea tasted bright and slightly dry. Honeydew tasted soft and fresh. Alternating felt smoother than combining. Combined pulls turned into a vague “melon tea” that lost definition.

Best draw experience picks: Mango + mint for the clearest blend. Custard + espresso for the most satisfying alternation.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $20\text{–}$35
• Device type: refillable pod system with dual-sided cartridge
• Nicotine strength options: depends on e-liquid used
• Activation method: draw/button described in some reviews
• Battery capacity: 1000mAh
• Output: up to 32W
• Pod capacity: total 4mL, split 2mL per side
• Coil style: replaceable coils supported in listings
• Fill system: dual side fill
• Flavors available: refillable device, flavor depends on e-liquid choice; tested sets focused on pairing, including Mango + Mint, Strawberry + Lemon Lime, Custard + Espresso, Watermelon Ice + Grape Ice, Tobacco + Peppermint, Peach Tea + Honeydew

Review Score

Caliburn GK3

Our Testing Experience

The GK3’s screen is the whole story. A segmented LCD gives you big numbers without the “tiny icon” feeling. I could glance down and know battery and settings fast. That mattered during short breaks. It also mattered when I was tired. The body shape is boxier, yet it feels sturdy.

I used it with G3 integrated coil cartridges. The pod fit felt tight. UWELL lists the GK3 at 900mAh battery capacity and up to 25W output, with 2.5mL capacity in some regions. That matched the “moderate power, steady draw” feel we got.

Marcus liked it more than he expected. He hates gimmicks. He did not treat this as a gimmick. He treated it as a practical screen. He said “At least I can read it,” then he moved on to heat checks. Heat stayed controlled. Output felt capped, yet stable.

Jamal carried it and noticed the corners. It prints in pockets. It also feels less comfortable in thin shorts. In a jacket, it was fine. He said “This is a square, and it acts like one,” which is exactly right. He still liked the juice window and the “dry pod base” behavior.

Draw Experience & Flavors

The GK3 draw felt slightly tighter than G4 units. It also felt consistent pull-to-pull. That worked well with nicotine salt style liquids in our testing.

Flavor 1: Blue razz ice. Bright candy hit early. Cooling hit late. Tighter airflow made the candy feel thick. I opened airflow slightly and it became more balanced.

Flavor 2: Kiwi strawberry. Kiwi brought tart edge. Strawberry brought sweetness. The GK3 made the kiwi “spark” more on the inhale. Marcus said “This one stays sharp,” which he liked.

Flavor 3: Mint chocolate. Chocolate can taste dry and powdery on weak coils. The GK3 kept it smoother. Mint sat on top like a cool film. On longer pulls, mint dominated.

Flavor 4: Lemon cake. Inhale brought lemon zest. Exhale brought cake sweetness. Tighter airflow made the cake note heavier. Looser airflow made lemon brighter.

Flavor 5: Apple ice. Crisp apple hit first. Cooling hit second. The GK3 made cooling feel more present due to tighter draw. Jamal said “It hits colder than I expect,” and he shortened pulls.

Flavor 6: Light tobacco vanilla. Tobacco sat under a soft vanilla. The GK3 kept it stable without turning it harsh. Throat sensation still rose with tighter airflow.

Best draw experience picks: Kiwi strawberry for clean contrast. Lemon cake for full-mouth layering.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $20\text{–}$30
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw/button (device button shown)
• Battery capacity: 900mAh
• Pod capacity: 2.5mL (INT/FDA), 2mL (TPD)
• Output: up to 25W
• Cartridges: G3 integrated coil cartridges (0.6Ω, 0.9Ω, 1.2Ω listed)
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Blue Razz Ice, Kiwi Strawberry, Mint Chocolate, Lemon Cake, Apple Ice, Tobacco Vanilla

Review Score

Caliburn X

Our Testing Experience

The Caliburn X feels older, yet it still earns space. It uses replaceable G-series coils. That changes cost behavior. Instead of replacing whole pods, you replace coils. I used it as a “workbench” device. I kept spare coils in a drawer. I swapped when flavor dropped. That routine feels familiar to adults who used older setups.

UWELL lists the X with an 850mAh battery and 3mL capacity, plus adjustable airflow and power up to 20W. That spec profile is exactly how it feels. Not weak, not modern-max. It stays practical.

Marcus liked coil swapping, yet he found the output ceiling limiting. He said “I can’t push it the way I want,” then he used it anyway because the airflow valve felt useful. Heat stayed fine, since power is capped.

Jamal disliked the extra maintenance steps. He does not want loose coils in a bag. He said “If I’m moving, I want pods,” which is his bias. At home, he enjoyed the adjustable airflow valve and the clear screen.

Draw Experience & Flavors

The Caliburn X draw depends heavily on coil choice and airflow valve setting. In our testing, it leaned slightly looser than A-series devices. It still stayed more MTL-friendly than high-output pods.

Flavor 1: Menthol watermelon. Watermelon sat forward. Menthol cooled late. The X kept it steady, yet it did not “pop” as hard as newer pods. I opened airflow slightly and took longer pulls to bring out the fruit.

Flavor 2: Blueberry ice. Blueberry candy note arrived early. Cooling hit the throat. On higher power settings, cooling got sharper. On lower settings, blueberry felt smoother.

Flavor 3: Vanilla tobacco. The vanilla softened the dryness of tobacco. The X delivered it with a mild warmth. When airflow got too tight, throat sensation rose quickly. I opened airflow and it mellowed.

Flavor 4: Strawberry milk. Cream note can get flat on older coils. The X kept it acceptable, yet not as layered as newer mesh pods. Marcus said “It’s fine, but it’s not thick,” which is fair.

Flavor 5: Lemon lime. Citrus felt sharp. The X sometimes made citrus taste slightly “thin.” I lowered power and took slower pulls. That made it smoother.

Flavor 6: Peppermint. The X did peppermint well. Clean, crisp, direct. Jamal said “This is the kind of mint that resets my mouth,” and he used it between sweet liquids.

Best draw experience picks: Peppermint for the cleanest pull. Vanilla tobacco for the smoothest daily feel.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $20\text{–}$30
• Device type: refillable pod system with replaceable coils
• Nicotine strength options: depends on e-liquid used
• Activation method: draw plus fire button
• Battery capacity: 850mAh
• Pod capacity: 3mL
• Output: 5–20W
• Coil support: Caliburn G/G2 series coils listed
• Airflow: external adjustment valve
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Menthol Watermelon, Blueberry Ice, Vanilla Tobacco, Strawberry Milk, Lemon Lime, Peppermint

Review Score

Caliburn A3S

Our Testing Experience

The A3S exists for adults who want minimal steps. No screens. No menus. It is mostly a draw device with a small battery. I treated it as a “short-session” tool. Two pulls outside a building. A few pulls while walking. Then it went back into a pocket.

The battery limit shows up fast if you use it like a main device. It is not built for that. UWELL and retailers list the A3S at 520mAh with 2mL pods and up to 16W output, and that is exactly how it behaves.

Marcus did not like it for his style. He chain-pulled and hit the ceiling. He said “This is not my kind of device,” then he moved on. Heat stayed fine, yet output felt small. He still respected it as a compact tool.

Jamal loved it. It is his kind of carry. He said “I can throw it in my pocket and forget about it,” and that matched his lifestyle lens. The mouthpiece felt comfortable. The pod fill stayed easy enough, though small.

Draw Experience & Flavors

The A3S draw leans tight. It favors MTL habits. That makes many liquids feel stronger in the mouth, even at lower vapor output. Cooling flavors feel sharper, since airflow is tighter.

Flavor 1: Strawberry ice. Strawberry hit first, then cooling hit late. The tight draw made cooling feel more intense. I shortened pulls and it felt cleaner.

Flavor 2: Mango. Straight mango felt juicy and sweet. The A3S made it feel concentrated. After several sessions, sweetness began to feel heavy. Jamal said “It’s like syrup if I chain it,” and he took longer breaks.

Flavor 3: Blueberry. Blueberry tasted like candy skin. The A3S kept it steady, though the flavor felt less layered than on higher-output pods. It still stayed pleasant for short pulls.

Flavor 4: Vanilla cream. Cream flavors can feel muted on low output. The A3S delivered a light vanilla, not a deep dessert. That is expected. I liked it for a calmer session.

Flavor 5: Mint. Mint popped on the tight draw. It felt crisp and direct. After a few pulls, the mouth felt “clean.” Jamal called it “the reset flavor,” and he kept returning to it.

Flavor 6: Tobacco. Dry tobacco tasted more intense on the tight draw. Throat sensation rose quickly depending on liquid strength.

Best draw experience picks: Mint for the cleanest mouth feel. Mango for the richest short-pull flavor.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $15\text{–}$25
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: draw-activated
• Battery capacity: 520mAh
• Output: up to 16W
• Pod capacity: 2mL
• Coil options: integrated 0.8Ω and 1.0Ω pods listed
• Fill system: side fill
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Strawberry Ice, Mango, Blueberry, Vanilla Cream, Mint, Tobacco

Review Score

Caliburn AZ3

Our Testing Experience

The AZ3 feels like a small tool built around carry habits. The lanyard loop changes the way some adults use it. It can hang. It can sit in a pocket without falling sideways. I used it on errand days when I did not want weight. It also handled glovebox carry well.

UWELL lists it with a 750mAh battery, 2mL capacity, and up to 17W output. It uses A3-style refillable pods. That spec set matches the way it behaves. More stamina than A3S, still not a power device.

Marcus again found the ceiling. He said “It’s fine for what it is,” then he moved on. He did like the stable body temperature under repeated pulls. The device stayed cool and predictable.

Jamal loved it as a “grab tool.” He said “This kind of device disappears,” then he clipped it to keys for a day. The cap and mouthpiece protection idea in some AZ3 variants appealed to him, since he hates pocket lint.

Draw Experience & Flavors

The AZ3 draw sits in the tight MTL zone. It delivers flavor with less vapor mass. That makes some flavors feel “sharp.” It also makes simple flavors work best.

Flavor 1: Watermelon. Clean and sweet. The AZ3 made it feel direct. The mouth feel stayed light. After a few pulls, sweetness lingered.

Flavor 2: Blue razz. Candy-blue note hit fast. Tight draw made it intense. I took shorter pulls to keep it from feeling too sweet.

Flavor 3: Mango ice. Mango hit first. Cooling hit late. The tight draw made cooling feel stronger than expected. Jamal said “It feels colder than my bigger devices,” and he reduced pull length.

Flavor 4: Mint. Crisp mint felt clean. The AZ3 made it a strong “reset” flavor. It also made throat sensation more noticeable if the liquid ran strong.

Flavor 5: Vanilla. Light vanilla felt soft. It did not feel “deep dessert.” That is normal at this output. I liked it as a calm flavor.

Flavor 6: Mild tobacco. Dry and steady. The AZ3 made it feel concentrated.

Best draw experience picks: Watermelon for clean sweetness. Mint for the cleanest mouth feel.

Pros & Cons

KEY SPECS & FLAVORS

• Price: $15\text{–}$25
• Device type: refillable pod system
• Nicotine strength options: depends on e-liquid used
• Activation method: auto draw
• Battery capacity: 750mAh
• Pod capacity: 2mL
• Output: up to 17W
• Pod specs: A3-style refillable pods in UWELL specs
• Materials: cartridge PCTG, device aluminum alloy
• Flavors available: refillable device, flavor depends on e-liquid choice; tested set included Watermelon, Blue Razz, Mango Ice, Mint, Vanilla, Mild Tobacco

Review Score

Compare Performance Scores of These Vapes

The most balanced devices sit in the G4 family. They stay strong across flavor, airflow, and leak control. The specialists show up fast. A3S and AZ3 win portability, then they give up battery headroom. Explorer wins variety, then it asks for more cleanup. G4 Pro wins control and battery, then it gives up pocket stealth.

Best Picks

• Best Caliburn Vape for Control: Caliburn G4 Pro
  Touch control made changes fast during real use. Scores stayed high across flavor and battery. The device fit adults who tweak output often.

• Best Caliburn Vape for Balanced Daily Carry: Caliburn G4 Classic
  It stayed stable without demanding attention. Scores stayed strong across leak resistance and ease of use. It fit adults who want a calm routine.

• Best Caliburn Vape for Pocket Life: Caliburn A3S
  Portability and ease of use carried its win. The small battery showed limits, yet the daily grab behavior stayed excellent. It fit adults who want short MTL sessions.

How to Choose the Caliburn Vape?

MTL vs RDL sits at the top. Tight MTL habits line up with A3S, AZ3, then GK3. A warmer RDL pull lines up with G3 Pro, G4, then G4 Pro. Adults who sit in the middle usually land on G4 Classic.

Nicotine tolerance varies. Higher strength liquids can feel sharp on tight airflow devices. Lower strength liquids can feel thin on low output devices. The device cannot solve that alone. Liquid choice matters.

Battery needs depend on session style. Short sessions spread through a day fit A3S or AZ3. Heavy all-day use fits G4 Pro best. G4 Classic sits in the stable middle.

Maintenance habits matter. Adults who hate wiping should lean toward newer pod platforms. Adults who enjoy coil swaps can use Caliburn X. Adults who like novelty and rotate flavors should consider Explorer, while accepting extra cleanup.

Practical matching

A light nicotine adult user who wants simple carry should look at A3S, then AZ3. Tight draw keeps pulls controlled. Pocket comfort stays high.

A former heavy smoker who wants a stronger, warmer pull should look at G3 Pro, then G4 Pro. Output headroom helps. Airflow control helps.

A flavor-focused adult user should start at G4 Pro or G4 Classic. The flavor scores stayed high. The pods stayed stable across refills.

A commuter who needs all-day battery should start at G4 Pro. Battery score led the table. G4 Classic works when sessions stay moderate.

A beginner adult user who wants low maintenance should lean toward G4 Classic or G4. Controls stay simple. Pods stay easy to source.

Limitations

The Caliburn lineup still has gaps. The smallest devices do not serve heavy users well. A3S runs out of battery fast when sessions get frequent. AZ3 lasts longer, yet it still caps out on power. Adults who chain-vape will feel that ceiling.

The higher-output Caliburn devices still do not replace full-size high-wattage rigs. G4 Pro and G3 Pro can push warmth, yet they remain pod systems. Adults who want very high airflow and very high vapor volume will outgrow them.

The “fun” devices add complexity. Explorer adds fill points and adds cleanup. That is a real trade. Adults who want the simplest routine should skip it.

The older platforms feel dated. Caliburn X can be cost-friendly, yet it asks for coil handling. Flavor layering also lags newer pods.

Across the whole lineup, nicotine risk remains. These are adult-only nicotine products. They are not for minors. They are not recommended for pregnant individuals. People who do not already use nicotine should avoid starting.

Is the Caliburn Vape Lineup Worth It?

Caliburn devices keep winning on day-to-day usability. Pod fit feels tight on the newer platforms. Wipe routine stays manageable. That matters for adults who carry a device daily. The G4 family shows that most clearly. Screen info stays readable. Controls stay predictable. Pods feel easy to live with. Pricing stays close to other mainstream pod systems.

Flavor performance stays a main reason to buy. Sweet fruit profiles stayed bright in the G4 units. Dessert flavors stayed warm, yet they demanded control. Mint profiles stayed crisp across most devices. The G4 Pro gave the most control over that feel. The G4 Classic stayed the steadiest with fewer changes. The G3 Pro pushed thicker pulls with the 0.4Ω style option. That helped adults who want denser vapor from a pod.

Throat hit varies with liquid choice. Tight draw devices make it feel sharper. Higher output devices can make it feel stronger. Those are sensations, not safety claims. Adults with low tolerance often prefer tighter MTL, plus shorter pulls. Adults with higher tolerance often want airflow and warmth.

Battery value depends on use pattern. The A3S can be worth it for short carry days. It fails as an all-day main device. The AZ3 stretches the same idea with more battery. The G4 Pro supports longer days. That comes with a larger body. Pocket comfort becomes the trade.

Leak behavior is mostly good in this lineup. That is not absolute. Pods still collect condensation. Mouthpieces still need wiping. The newest pod platforms reduced “wet” events in our routine. Older platforms needed more attention. Explorer created more cleanup points by design.

Value drops when the device does not match the adult user’s routine. A heavy user buying A3S will get frustrated. A minimalist buying Explorer will feel annoyed. A screen-hater buying G4 Pro may hate the touchscreen.

For practical value, the lineup still holds up. G4 Classic covers most adults well. G4 Pro fits adults who want control and battery. A3S fits adults who want tiny carry. The rest fill narrower needs.

Pro Tips for Caliburn Vape

• Keep one small microfiber cloth near your pods. Wipe the mouthpiece daily.
• After refilling, let the pod sit a few minutes. Avoid immediate chain pulls.
• Use shorter pulls on tight MTL devices. That keeps cooling liquids from feeling harsh.
• Check the pod base for condensation. Do it before pocket carry.
• If flavor dulls fast, lower output first. Then consider swapping the pod or coil.
• Avoid overfilling side-fill pods. Leave a small air gap.
• Keep the charging port clean. Pocket lint builds up fast.
• Store spare pods upright when possible. That reduces seepage in a bag.
• For dessert liquids, use moderate output. Heat can push “burnt sugar” notes quickly.

FAQs

How long does a Caliburn pod usually last in real use?
Pod life depends on liquid type and session style. Sweet liquids tend to shorten coil life. In our rotation, flavor drop often showed up after several refills. A burnt taste meant the pod or coil needed replacement.

How often should adult users replace coils or pods?
Replace when flavor turns flat, when sweetness tastes “toasted,” or when draw starts to feel wet. Coil-swap devices like Caliburn X invite earlier swaps. Integrated pod devices turn replacement into a pod change.

What battery life should adults expect from small Caliburn devices?
A3S class devices can cover light use. Heavy use will drain them quickly. AZ3 lasts longer than A3S, yet it still is not a “two-day” device for frequent sessions.

Do Caliburn devices leak in pockets?
Any refillable pod can leak under rough carry. In our checks, newer pods stayed drier. Condensation still collected. Pocket carry still benefits from quick mouthpiece wipes.

How consistent is flavor over time on Caliburn pods?
Flavor tends to start bright, then settle. After repeated sessions, dessert notes can darken. Cooling notes can feel sharper on tight airflow devices. Adjusting airflow and output can restore balance for a while.

What nicotine strength works best in Caliburn devices?
Nicotine choice depends on the adult user’s tolerance and habits. Tight MTL devices can make higher strengths feel intense. Higher output devices can amplify throat sensation.

Is there a real difference between G4, G3 Pro, and GK3 for daily use?
Yes, mainly in control style. G4 feels like a modern default with adjustable output. G3 Pro suits adults who switch styles more often. GK3 suits adults who want big, readable info fast.

Is the Explorer worth it, or is it a gimmick?
It is worth it for adults who rotate flavors often. It adds maintenance steps. It also adds real convenience if you hate swapping pods. Adults who want minimal routine should skip it.

Sources

• National Academies of Sciences, Engineering, and Medicine. Public Health Consequences of E-Cigarettes. 2018. https://nap.nationalacademies.org/catalog/24952/public-health-consequences-of-e-cigarettes
• World Health Organization. WHO report on the global tobacco epidemic (latest edition). https://www.who.int/teams/health-promotion/tobacco-control/global-tobacco-report
• U.S. Centers for Disease Control and Prevention. Electronic Cigarettes. https://www.cdc.gov/tobacco/e-cigarettes/
• U.S. Food and Drug Administration. Vaporizers, E-Cigarettes, and other Electronic Nicotine Delivery Systems (ENDS). https://www.fda.gov/tobacco-products/products-guidance-regulations/vaporizers-e-cigarettes-and-other-electronic-nicotine-delivery-systems-ends