ON THE WAY&reg;4Pcs 3.7V 16340 2000mAh Rechargeable Lithium Ion Battery Protected More Power High Capacity Come with Dual Battery Charger Universal for Li-ion battery 18650/16340/14500/CR123A etc. ON THE WAY4Pcs 16340 battery for laser pointer and flashlight and so on electronic devices, come with AC Universal Charger. Pollution-free, long cycle life, no memory effect, good consistency, low self discharge.With short-circuit production function, safe and reliable. Warm tips: Before purchase, please make sure the battery voltage corresponds with voltage mark on your device. Suitable for flashlight, LED headlamps, bike lights, balanced car,electric tools,model aircraft,medical equipment, etc. AC 16340 cordless charger is capable of charging 1 or 2 batteries simultaneously.