This is a 21700 battery to use in powering your vaping appliance or other devices. These batteries have been through extreme testing to ensure the user's safety. Be sure to check what batteries your device needs before trying them as improper use may damage it.
- Size: 21mm diameter x 70mm long
- Type: Li-ion INR (Rechargeable)
- Rated Capacity: 4000mAh
- Voltage: 3.7V
- Protected: No
- Style: Flat Top
- Rated storage temperature: 20-60℃