The 18650 Battery Charge Cradle from Streamlight is a dual-bay charger with an impact-resistant polymer housing that takes a Micro-USB or AC adapter input. It also accepts 12V power sources to supplement the charging batteries. When charging a single battery in either bay, it takes 3.5 hours for it to fully charge, and for two batteries charging simultaneously, the left bay still takes 3.5 hours, but the right bay takes 6.5 hours to charge. Additionally, the charging status LEDs indicate when the batteries are full, and the built-in temperature safety circuit protects the cells from being damaged during the charging process.