The Streamlight Charging Cradle Kit provides an alternate power source for newer Streamlight products that accept either standard CR123 lithium batteries or SL-B26 (18650) button top batteries. The two bay SL-B26 (18650) Button Top battery charger can recharge one SL-B26 (18650) battery in as little as 3.5 hours, or two batteries in as little as 6.5 hours. The charger features dual input power sources, accepting either 5V USB power or 12VDC power. Dual input power sources provide a wide variety of battery charging options when a wall outlet is not available, such as a PC, power pack or 12VDC automotive power.FeaturesTwo bay design with single bay priority speedsIndividual bay LED display for charging status Charger temperature safety circuit prevents damage to batteries Button Top Lithium batteries are rechargeable up to 500 times