... , backlight-key and function-keyPre-charge, fast charge and constant voltage charge for charging stages and the variation range of the ... values of the constant current and the constant voltage is less than 1%Constant current for dischargingWith a USB ... External load: 0mA, 500mA, 1000mA, 1500mA, 2000mA, five gears with dip switches offered Tester will stop discharging if one of the conditions ...