Attention: check that the cell voltage is basically stable connecting in series Charging Voltage: lithium battery charger 12.6V (switching power supply 13-16V); Charging Current: 25A max. Power Balance Voltage: 4.2±0.05V; Power Balance Current: 45mA Protection function:Over charge protection, over discharge protection function, short circuit protection function, over current protection function, balance Over Charge Voltage Range: 4.25-4.35V±0.05V; Over Discharge Voltage Range: 2.3-3.0V±0.05V; Over Current Voltage: 150mV; Maximum Operating Current: 0-25A; Maximum Transient Current: 35-40A Color: green material: plastic Package Contents: 4pcs 3S 25A Lithium Battery Protection Board Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.