How it works: The battery equalizer is a power mode equalization. When the voltage difference between the batteries connected in series exceeds 10 mV, the battery equalizer starts to work, and the current will flow from the battery with the higher voltage to the battery with the lower voltage, and the maximum compensation current is 10A.When the voltage difference between the two batteries is lower than 10mV, the equalizer starts to workThe equalizer can be used during charging and discharging, and can play a role in balancing the battery voltage.Can be used for lead-acid batteries, lithium iron phosphate batteries, -cadmium or -metal hydride batteries.Name: Battery BalancerDisplay: LED displayWorking voltage: 4*0.4/3.6/12VCompensation current: 0-10AStandby current: Less than 1.8Working temperature: -20~+55Protection: reverse polarity protectionSize: 62 x 124 x 27mmcolor:BlackMaterial:ABSPackage Contents:1 x Battery BalancerOnly 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 is +/- 1-3cm.