CHARGING IN THE INTELLIGENT WAY CHU4-USB battery charger The battery charger's intelligent control circuit automatically detects the incoming current and automatically adjusts the device accordingly. The charger measures the input current through its advanced integrated circuit and automatically sets the most suitable value for charging the battery for the best and safest operation. The charger automatically adjusts to the input current range between 500 and 2000 milliamps. The input current determines the length of battery charging time. Use your own power adapter. Attention! This charger is only compatible with KENTLI AA batteries! Not suitable for charging AAA batteries. Features: USB socket Four independent charge indicator lights Four independent battery storage