BTBAI 2X 14250 LS14250 CR14250 1/2 AA Battery top Flat Rechargeable 3.7V Li-ion for LED Flashlight Torch Headlamp Instrument and Equipment Tools 280mah Top Flat,280mah capacity.14250 3.7V Li-ion Rechargeable Battery Having an extra long life for all your battery powered devices Providing excellent continuous power sources to your device Can be charged over 500 times Low discharge rate, No memory effect