Uwell Caliburn A2S Pod System

The Uwell Caliburn A2S Pod Kit (CRC) is the latest evolution in the popular series of MTL vaping devices, featuring upgraded pods and a refined chassis. Compact, dependable, and user-friendly, the Caliburn A2S is perfect for enjoying rich, flavorful vapor with nicotine salt e-liquids, suitable for all experience levels.

This device boasts a sleek, pocket-friendly aluminum alloy frame similar to the original Caliburn A2 and Caliburn G2, now enhanced with a convenient e-liquid viewing window and a buttonless design for intuitive puff activation.

Powered by a 520mAh battery delivering a consistent 15W output, the Caliburn A2S charges rapidly via a USB-C port, reaching over 90% charge in under 35 minutes. Its multicolor LED battery indicator clearly shows power levels during use and charging (green > 60%, blue 30%-60%, red < 30%).

The Caliburn A2S pod (CRC version) holds 1.8mL of e-liquid and features a user-friendly top fill port with an automatic press-lock to prevent leaks. It uses a built-in FeCrAl UN2 Meshed-H 1.2Ω coil for smooth, flavorful vapor production and is compatible with the original 0.9Ω Caliburn A2 pods.

Replacement Caliburn A2/AK2/A2S Pods (4-pack) are available here.

Important Notes:

• Caliburn A2S Pods are NOT compatible with original Caliburn, Caliburn G, Caliburn Prime, or Caliburn Koko devices.
• The CRC version features a top-fill spring-loaded port, differing from the side-fill design listed on the Uwell website.

Specifications & Features:

• Dimensions: 110.1 x 21.3 x 11.7mm
• Material: Aluminum Alloy
• Battery Capacity: 520mAh
• Net Weight: 31g (with empty pod)
• Output Power: 15W
• USB-C Fast Charging (90% in under 35 minutes)
• Pod Details:
  • Capacity: 1.8mL
  • Top-fill design with automatic lock
  • Built-in 1.2Ω FeCrAl UN2 Meshed-H coil
• Draw-activated firing
• E-liquid viewing window
• Multicolor LED battery indicator
• Fixed Mouth-to-Lung (MTL) draw restriction
• Child-Resistant Closure (CRC)

Package Contents:

• 1x Pod System Base
• 1x Meshed-H 1.2Ω Pod
• 1x User Manual
• Note: Charging cable not included

Operating Instructions:

• Filling the Pod:

  • Press the mouthpiece sideways to remove it while the pod remains in the device.
  • Press the fill tip into the port to unlock and fill the pod carefully.
  • Replace the mouthpiece securely.
  • Wait 10 minutes after filling before use to allow wick saturation and prevent dry hits.

• Power On/Off:

  • Device is buttonless and powers on automatically when charged.

• Using the Device:

  • Simply inhale to activate puff firing.
  • Maximum draw time is 8 seconds; exceeding this causes the LED to flash green 5 times and the device to stop working temporarily.

• Battery Indicator:

  • Green: > 60% charge
  • Blue: 30%–60% charge
  • Red: < 30% charge
  • LED flashes to indicate battery level during use
  • LED flashes red 10 times when battery is depleted

• Charging:

  • LED colors indicate charge level while plugged in
  • LED remains solid when fully charged

• Protections:

  • Short Circuit: LED flashes red 3 times; device stops working.
  • Low Voltage: LED flashes red 10 times; device stops working.
  • Timeout: LED flashes green 5 times after 8-second draw; device stops working.
  • Open Circuit: LED flashes blue 3 times if pod connection is faulty; device won't work.

Frequently Asked Questions (FAQs):

1. What’s the difference between Caliburn A2 and A2S?

Though similar in design, the A2S is buttonless with exclusive puff activation and is always on, unlike the A2 which has a button and can be powered off. The A2S indicator light is integrated into the logo with animated flashing, whereas the A2 has a single multicolor base light. The A2S uses a 1.2Ω pod; the A2 uses two 0.9Ω pods. Both share a 520mAh battery with USB-C fast charging and automatic power adjustment based on pod resistance.

2. Why is my Caliburn A2S blinking green?

A blinking green light means the battery charge is above 60%, indicating sufficient power.

3. Why is it blinking blue?

Blue blinking shows battery charge between 30% and 60%; it’s a good charge but you may need to recharge soon.

4. Why is it blinking blue and not firing?

If not firing, check the e-liquid level first. If adequate, clean the contact points between pod and device from dirt or moisture and reconnect.

5. Why is it blinking red?

Red blinking means less than 30% battery remaining. It will blink red 10 times before shutting off; recharge promptly.

6. Why is my device leaking?

Leaking can occur if the device is tilted, overfilled, or if you inhale too forcefully. Ensure you fill to recommended levels and vape moderately.

7. Why does my Caliburn A2S taste burnt?

A burnt taste is usually due to a dry wick inside the coil. Replace the coil if the taste persists and avoid vaping when the e-liquid is low.

8. When should I replace my Caliburn A2S?

Replace when vaping quality declines despite coil changes, persistent leaks, or charging issues. Or if you want an upgrade or different experience.

9. When should I refill my pod?

Refill when the e-liquid viewing window shows low or empty liquid; frequency depends on vaping habits.

10. How long does the battery last?

The 520mAh battery typically lasts 1-3 days depending on usage; overuse, overcharging, or poor storage can shorten lifespan.

11. What e-liquid is recommended?

A 50/50 VG/PG ratio e-liquid is ideal for Caliburn A2S, balancing flavor, throat hit, and vapor production. Nicotine salts in the 5-20mg range suit most mouth-to-lung vapers.

12. Why is the black cap hard to remove?

New pods may have tight caps; use a fingernail to pry gently upward and outward to loosen.

13. Why isn’t my device producing vapor?

Check for dirt or residue on connectors and clean if necessary. Replace pod if problem continues; device may be faulty.

14. Why is vapor output low?

Low vapor can be due to low battery (indicated by blue or red LED). Recharge device to restore full output.

15. What causes spit back?

Spit back happens when e-liquid floods the coil, often from vaping too hard. Puff moderately to avoid.

16. Why won’t my device charge?

Check charging cable and port for damage; try alternative cables or ports.

17. Why does my pod auto-fire?

Auto-firing is caused by faulty airflow detection. Clean pod base and device contacts; avoid blocking air intake holes. Contact retailer if issue persists.

18. How do I fill the pod?

Remove mouthpiece by pressing sideways, push bottle tip into fill port to unlock and fill, avoiding overfill.

19. How to clean the pod?

Wipe pod surface, connectors, sensors, magnet, and mouthpiece with paper towel and disinfectant wipes.

20. How long does the device last?

Device longevity depends on coil, battery, and e-liquid condition; typically lasts several weeks with proper care.