STREAMLIGHT Stinger PiggyBack Smart Charger Holder with the INCLUDED SPARE BATTERY allows you to double your battery power by simultaneously charging your Stinger flashlight PLUS the extra battery. New Smart Charger technology brings faster charging with a sensor that detects the charge status of your light. A steady LED means the light is charging, while a blinking LED means it is charged and ready to use. FEATURES of Streamlight Stinger PiggyBack Smart Charger: - Compatible with Streamlight Stinger series flashlights including Stinger LED HL/DS LED HL, Stinger LED/DS LED, Stinger HPL/DS HPL, PolyStinger LED/DS LED, Stinger Classic; - DOES NOT WORK with UltraStinger, Stinger Switchblade, Stinger 2020 and PolyStinger LED HAZ-LO; - Dual power input charger; - Integrated micro USB port; - Also accepts 12V DC car charge cord and 100V/120V AC home charge cord; - Charging indicator: Steady LED - charging; Blinking LED - charging is complete; 12V DC Car Charge Cord is a replacement power cord that can be used with most Streamlight rechargeable flashlights. It features 12V DC input and lighter plug. Use this power cord to recharge your flashlight from a 12V DC power source such as your car or truck. This bundle includes the Streamlight Stinger PiggyBack Smart Charger Holder (75277), spare battery and 12V DC Car Charge Cord (22051). All these items are supplied together in one package.