18650 120V AC Charger Kit with Two 18650 Batteries Capable of charging a single 18650 battery or two simultaneously. Dual input: accepts either 5V micro-USB or Streamlight “traditional” AC or 12V DC power sources; Micro-USB input with custom locking feature charges from Streamlight AC/USB adapters or most other USB sources. Impact- polymer construction. 18650 button-top lithium ion battery on-board safety control circuit; rechargeable up to 500 times. Single bay: 3.5 hours (either bay). Both bays: 3.5 hours left bay (priority) and 6.5 hours right bay. Individual bay LEDs for battery charge status. Charger: 4.5 in. (11.4 cm); 2.4 oz. (68 grams). Battery: 2.75 in. (7.0 cm); 1.7 oz. (48 grams). Use with Streamlight products that accept 18650 batteries, including the ProTac HL USB and ProTac HL 4 22011