refun 18650 Battery and Charger, 4 Pcs 18650 3.7V Rechargeable Protected Lithium Batteries for LED Flashlight Lamp Torch High Drain 18650 batteries: No memory effect ,can be recharged up to 1200 times when fully or partially drained Performance: Charge 2 batteries simultaneously, each of the two batteries monitors and charges independently Intelligently Charge: with overcharge / discharge protection function, so you can use it without worry Compatible for various kinds of flashlights and LED headlamps, torches, bike lights etc 100% Satisfaction Guarantee: 90 days money back and lifetime technique support