BESTSUN 18650 Protected Rechargeable Batteries, (2 Pack) 2800mAh 3.7V lithium Li-ion 18650 Battery with Charger Combo for Flashlights Torch Headlight Headlamps High quality ,Professional and Reliable Pack of 2 2800mAh 18650 Li-ion rechargeable batteries and wired battery charger The charger will charge the battery when plug in,and the indicator light display in red,then turn into green after fully charged High energy density,This battery has an extra long life for all your battery powered devices, Charges 1 or 2 batteries simultaneously. With overcharge / discharge protection function that you can use it without worry. Not for the devcies match the Flat Top 18650 battery like E-cigarette, Reuleux RX 200 and so on.