ON THE WAY&reg;2Pcs 18650 3.7V 2800mAh Rechargeable Lithium Batteries Comes with Dual Charger ON THE WAY2Pcs 18650 2800mAh Li-ion Batteries with 1Pc Dual Channel Charger Battery deliver 3.7 volts, real 2800mAh capacity, always save you on emergencies at any time With overcharge / discharge protection function that you can use it without worry. No memory effect, can be recharged up to 500 times when fully or partially drained. Compatible with various kind of flashlight and LED headlamps, bike lights,scientific testing instruments, printers, digital cameras, etc.