HX02 battery balancer is an energy transfer balancer that can compensate for batteries in both directions. When the voltage difference between batteries connected in series exceeds 10 millivolts, the battery equalizer begins to operate, and the current will flow from the high-voltage battery to the low-voltage battery. A low battery will eventually balance the battery. It can be connected to a series of batteries for a long time and can automatically maintain battery balance without maintenance.What is the Battery Balancer? A battery balancer is a device used in a battery system where multiple batteries are connected in series. Its main is to equalize or balance the voltage or state of charge (SOC) across each individual battery within the series to they all discharge and recharge evenly. This is crucial because if one battery discharges faster than the others, it could potentially be damaged, or it could limit the capacity of the entire system.Balancing can be either passive, where excess energy in high-voltage cells is dissipated as heat, or active, where that energy is transferred to lower voltage cells.Why does the battery pack require the installation of a battery balancer? The battery balancer offers advantages such as improved battery performance, increased efficiency, enhanced safety, extended lifespan, compatibility with different cell characteristics, and flexibility in cell replacement. These advantage a valuable component in systems that rely on battery packs, especially those that prioritize optimal performance and .Aluminum CaseLCD DisplayMultiple battery types7-18V unit battery voltageSupport Multi-module parallelRail type easy to install1m extend wire Improved battery performance Increased battery pack efficiency Enhanced safety Extended battery pack lifespan Compatibility with different cell characteristics Flexibility in cell replacementColour:BlackMaterial:PlasticPackage Contents:1 * Battery EqualizerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.