ON THE WAY16340 3.7V 10PCS 2000mAh CR123A Protected Rechargeable Lithium White Battery with Smart Dual Wall Chager for16340 Flashlight Torch, Photo Camera,Laser Pen Application for Li-ion rechargeable batteries (16340, CR123A) Protective circuit inside: protect from overcharging 16340 3.7V 2000mAh CR123A Rechargeable Battery Perfect for Flashlight, Photo camera ....... The 16340 battery up to 1000 cycles, without memory effect