PB2 BLUE with Charger, manufactured by Xtar, is an electronic part specifically designed for rechargeable batteries. It is capable of operating with Li-Ion 3.6/3.7V batteries and can output up to 2.1A of current at 5VDC. The charger has short circuit protection, over-current protection, over-discharge protection and over-temperature protection. The device also features a bright LCD display, allowing the user to monitor and control the charging current, voltage, real-time capacity, and charging status.