The 8S 29.6V 18650 Lithium Battery Equalizer Board with 33.6V Polymer Battery Equalizer Board Connector is designed to maintain voltage balance across cells in an 8-series battery pack. It prevents overcharging and over-discharging of individual cells, improving battery efficiency, extending life, and enhancing performance. Suitable for Li-ion and LiPo batteries in applications like e-bikes, solar systems, and energy storage units.