The Latest and First USB Rechargeable 18650 battery of ULTRAFIRE.


Why UltraFire UF-3400 USB Rechargeable 3400mAh 18650 battery worth to buy?

1. Long Run-Time: 3400mAh Actual capacity Premium Energy Efficient High-Output, 100% capacity 18650 can make your flashlight work over 8 hours.
2. Durable: Batteries rechargeable up to 500 times!
3. Built-in PTC: Using an innovational positive protection circuit and its positions on the positive of battery which is different from traditional circuit protecting board placement, that acts as a circuit breaker to shut down the battery if it gets too hot
4. Triple Overheat Protection: automatically protects against overcharge, over discharge and short-circuiting.
5. External safety features: equipped at both ends with a nickle-plated S.S protector ensuring high impact resistance, good electrical conductivity and oxidation resistance; tough plastic circuit board protector; coated with durable metallic film to guard against abrasion.

Please Notice: Since protected board was compatible with USB-Micro charging, the length (69mm) is longer than conventional 18650 battery. Please take carefully consideration before using on other devices.

WARRANTY: Rechargeable batteries are warranted for one year from the date of purchase.