Battery Equalizer Power Bank Case 12V Battery Holder 21700 Storage Box Balance Circuit 40A 80A BMS PCB 3S Powerwall 21700 Battery Pack DIY Electric Bike (Color : 3S2P 80A BMS)

Battery equalizer is used to maintain the charge and discharge balance between each battery in series connected batteries. Battery equalizer can compensate the battery in both directions. Reverse polarity protection, low voltage disconnect to provide longer battery life. Reverse polarity protection, low voltage disconnect to provide longer battery life. Can be connected in series for a long time in the battery, so as to automatically maintain the balance of the battery condition. Intelligent battery voltage balancing system stabilizes the battery and reduces the battery life.