A charger to use with the most advanced high-power Lithium Iron Phosphate battery technology from BikeMaster. The unit is designed for charging / maintaining lithium-ion batteries. Input: AC 120V, 60Hz; Output: DC 12V, 2A. Built-in circuit protection guards against overcharging, short circuit and reverse polarity. Shock-resistant ABS material. Convenient, color-coded ring terminals and alligator clips for easy, correct installation. Fully automatic: Powers on when needed, and leave it for long-time maintenance. Power on LED indicator. Reverse polarity indicator; red LED light will warn if the battery connections are reversed. Charge indicator: Red LED light indicates the battery is charging. Green LED light indicates fully charged battery and unit enters maintenance mode.