OLIGHT S15R Baton rechargeable XM-L 280 Lumens LED Flashlight EDC with type 14500 Li-ion battery, charging base and four EdisonBright AA alkaline back-up Batteries Olight S15R (rechargeable S15) now Includes new Micro-USB charging dock and a 14500 750mAh rechargeable battery NEW Low-profile side switch featuring a battery power indicator, which glows red when battery runs low NEW Thermal management safety program provides overheating protection by dropping high output to medium output after 15 minutes of constant on Automatically return to your last brightness level with the built in memory function; Removable two-position pocket clip Bundle include four EdisonBright AA alkaline back-up batteries.(In addition to rechargeable Olight 14500 battery)