WARNING: This product contains nicotine.
Nicotine is an addictive chemical.

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21700 Battery (Li-ion, 3800mAh, 3.7V)

21700 Battery (Li-ion, 3800mAh, 3.7V)


Shop the 21700 Li-ion battery designed for powering vaping mods and other electrical devices. 3800mAh capacity, it provides a safe, steady current for extended periods.

Please note: While our 21700 Li-ion batteries are branded by Aspire, they are universally compatible and can be efficiently used with any device requiring this type of battery, including popular brands such as Smok, Geekvape, and other brands. Rest assured, adding this Aspire-branded battery to your cart will provide a reliable power source for your device, regardless of its brand.

Optimize Your Vape: Pair with our Highly Recommended Natural Tobacco Blend. Click here to choose your nicotine options.

In stock



  • Size: 21700
  • mAh: 4000mAh
  • Voltage: 3.7V


The Aspire 3800mAh battery is a high-performance 21700 battery designed for vaping mods and other electronic devices. Tested rigorously, the Aspire 3800mAh battery can handle significant current for prolonged durations, ensuring reliable power for your devices.


  • Size: 21700 (21mm diameter x 70mm long)
  • Type: Li-ion INR (Rechargeable)
  • Capacity: 3800mAh
  • Voltage: 3.7V
  • Protection: No
  • Style: Flat Top
  • Storage Temperature: Rated 20-60℃

Safety Guidelines:

Battery safety is paramount. Improperly handled batteries can overheat or vent, leading to potential harm. Adhere to the following precautions:

  • A. Ensure the battery wrapper is intact. Any damage, even minor tears, can be hazardous.
  • B. Store batteries safely. Avoid keeping them loose in pockets or bags where they can contact metal objects. Use protective cases.
  • C. Avoid exposing batteries to extreme temperatures.

Additional Safety Tips:

  • Fully charge before first use.
  • Avoid over-discharging (below 2.5V under load or 3V unloaded).
  • Use quality chargers designed for Li-ion batteries.
  • Be aware of the battery’s current limits and never exceed them.
  • Charge only up to 4.2V. Never exceed 4.3V.
  • Monitor batteries when charging. Don’t leave them unattended.
  • For long-term storage, keep batteries at 3.6V – 3.7V in a cool, dry place.
  • Use chargers specifically designed for Li-ion batteries.

Note: We are not responsible for any harm resulting from battery misuse or mishandling. Always prioritize safety.

Additional information

Weight 2.14 oz
Dimensions 3 × 2 × 1 in



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