Streamlight now offers 18650 batteries for our products that accept them. Charge your batteries – one or two at a time – in the dual input charging cradle. It uses either USB or traditional AC/DC power sources for a wide variety of battery charging options. – 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-resistant polymer construction – 18650 button-top lithium ion battery on-board safety control circuit; rechargeable up to 500 times – Charge time – 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