Features Battery Protection: The battery balancer has an intelligent voltage compensation system that keeps the battery idle and automatically turns off when the voltage is low, extending the battery life. Automatic Balance: The battery balancer can be connected in series to the battery for a long time, used to maintain the charge and discharge balance between various batteries in series. More Durability: The battery balancer can maintain balance in both charging and discharging directions, with reverse polarity protection, low voltage insulation, and reverse connection protection to ensure longer battery life. Applicable Batteries: Suitable for lithium batteries, hydrogen batteries, lithium iron batteries, with balanced voltage. Wide Application: The battery balancer can be used for battery configurations such as cars, ships, motorcycles, and solar panels. Specification: Item Type: Battery Active Equalizer Material: ABS, PCB Battery Standard Voltage: 4 x (6V/9V/12V) Compensation Current: 0-10A Protection: Reverse Polarity Protection Standard Undervoltage Value: 6V Package List:1 x Battery Active Equalizer1 x User Manual Package List 1 x Battery Active Equalizer 1 x User Manual