Simple operation, the charging process is completed in Voltage display function, no need for external adapter, detect at any time Ultra-high charging accuracy, the error is within ±10mV. Multiple protection functions to the safety of batteries and users Old battery automatic repair function. Newly designed balance architecture and algorithm, no need to discharge, saving energy warn: Before charging, please make sure the power of the adapter is sufficient ( ≥30W ). Before charging, please confirm the voltage range of the adapter ( 9V-16V). This charger is only suitable for charging Li-ion or Li-polymer batteries. At any time, only one battery balance port of the charger can be connected. It is forbidden to use 2 or more battery balance ports at the same time Charging function description After inserting the adapter, the charger make a "beep" sound and the display display; Insert the battery, the charger beep twice and start charging. The display cycle shows the total battery voltage