This 18650 Li-ion Rechargeable is a high powered lithium battery that is perfect for demanding electronics such as tactical LED flashlights. These batteries feature 3.7 Volts of power and a top of the line 1200mAh capacity that will keep high drain electronics running longer than competing power sources. Combined with reliable manufacturing quality and bulk value pricing, the Dozaski18650 is one of the best deals when it comes to li-ion power. High quality and durable, No memory effect; Provides excellent continuous power sources to your device.