1. Battery equalizer is used to maintain the charge and discharge balance between each battery in the battery pack connected in series or parallel. During the operation of the battery connected in series or parallel, due to the difference in the chemical composition and temperature of the battery cells, it will cause the charging and discharging of the two batteries will be different. Even when the battery is idle, due to the different degree of self discharge, it will cause an imbalance between the batteries connected in series. During the charging process, due to the difference, one battery will be overcharged or discharge, while the other is not fully charged or discharged. As the charge and discharge process is repested, this difference will gradually intensify, eventually leading to premature battery failure.
2. iSunergy battery equalizer is an energy transfer equalizer that can compensate the battery in both directions. When the voltage difference between the batteries connected in series exceeds 50 millivolts, the battery equalizer starts to work, and the current will flow from the higher voltage battery to the lower voltage. The low battery will eventually balance the battery. It can be connected to the battery connected in series for a long time to automatically maintain the battery balance without maintenance.

Specification:
Rated Voltage Scope: 7-18V
Optimizing Current: 0-10A
Quiescent Current: 10mA
Connection method: Parallel Connect or Series Connect
Multi-module parallel connection: Support
Product Size: 85*75*30mm
Product Weight: 160g

Packing including:
1*Battery Equalizer
2*battery connection terminal wires
1*Parallel wiring