TrustFire 18350 800mAh
Supports 500 to 1000 recharges
Protection against short-circuit, over charge, over discharge and overload.
Flat Top: 36*18.33mm (Length x Diameter)
Environment friendly and perfect for vaping,
Voltage (V) :3.7V
Size: 3.54 cm x 1.83 cm
Note: You should never let the battery runs out, because it cannot be recharged in this case.