Features: 1.Auxiliary Board: The equalization board is only an auxiliary of the BMS protection board, without overvoltage and overdischarge protection functions.Any bad battery test can be used. Voltage protection can only be achieved when used in parallel with the BMS protection board 2.Applicable Battery: NCM(Li ion) LFP, general ternary iron lithium battery, LTO battery is not supported. Single voltage working range 3.0V to 4.5V; recommended battery capacity below 30AH 3.Equalization Method: Is detected that the voltage difference between adjacent batteries is greater than 0.1V to trigger the equalization start, and the voltage difference is less than 0.03V to stop working. (It takes multiple charging and discharging to achieve a better balanced effect.) 4.Voltage and Current: 30mV (typical value) voltage balance accuracy between adjacent voltages, 0.1V voltage difference 0.5A balance current, when the voltage difference is above 0.2V, the maximum balance current is 1.2A. 0.01mA quiescent current, enter sleep state when the adjacent voltage difference is less than 0.03V 5.Pay Attention: Compatibility with low strings is not recommended, the indicator light will flash and report an error. Check that each battery is properly wired and insulated before connecting. Otherwise it will short circuit and burn the board specification:Item Type: Battery Active Balancer Material: PCB Operating Voltage: 3.0V to 4.5V Applicable Battery: NCM(li Ion) LFP, General Ternary Iron Lithium Battery PackageList: 1 xBatteryActiveBalancer 1 x Cable NoteGeneral Lithium iron ternary battery, not suitable for LTO battery