ON THE WAY&reg;10Pcs 14500 3.7V 900mAH Li-ion Lithium Rechargeable Battery AA Batteries with PCB for Led Flashlight High quality and good performance Warm tips:Before purchase, please make sure the battery voltage corresponds with your device voltage compatible with most brands of flashlights and various high-drain devices. Provides excellent continuous power sources to your device High level of certification: certified by CE, UL and ROHS