Key benefits — why you need this product Keeps series-connected lithium cells closely matched to extend pack life and reduce maintenance costs by correcting cell voltage imbalances automatically. Reduces the frequency and cost of manual reconditioning or cell replacements by actively restoring adjacent cell voltage differences to near-equal levels during normal use. High-energy transfer capacity (1.2 A) speeds balancing and improves the overall efficiency and runtime of the battery pack. What it does (core functions) Adjacent-voltage difference compensation: when the voltage difference between neighboring cells exceeds 0.1 V, the internal circuit triggers balancing. Compensation continues until the adjacent difference is within 0.03 V, then the board stops. Operates during charging and discharging whenever neighboring cell voltage differences occur. Uses inductive energy transfer (balance card principle) to move energy between adjacent cells without external discharge resistors. Key specifications Working Voltage: 2.0V–4.5V Maximum balancing current: 1.2 A (high-current energy transfer) Balancing trigger threshold: >0.1 V between adjacent cells Balancing stop threshold: ≤0.03 V between adjacent cells Compatibility and required system connections Designed to work with lithium battery packs; must be connected together with a lithium battery protection board for safe operation. This board implements adjacent-cell balancing only and is not intended as a standalone battery maintenance tool. It requires the protection board and the pack’s normal charge/discharge processes to create the pressure differences that trigger balancing. Performance and behavior Passive until triggered: the chip remains idle until an adjacent-cell voltage difference exceeds 0.1 V, minimizing unnecessary energy transfer. Precise cutoff: balancing stops automatically when the adjacent difference falls to 0.03 V or less, avoiding over-compensation. Inductive transfer method provides efficient energy redistribution between neighboring cells without wasting energy as heat via resistor dumping. Practical applications / use scenarios Electric bikes and scooters: keeps series lithium cells balanced during regular charge/discharge cycles to preserve range and reduce premature cell failure. Solar home storage and UPS systems: maintains even cell voltages under varying charge rates, improving pack efficiency and reliability over many cycles. Multi-cell power tool or hobby battery packs (RC, drones): reduces imbalance that can develop from uneven loading or charging, helping sustain performance and prolong pack life. Installation and operational notes Must be installed in the battery pack in conjunction with the lithium battery protection board. Do not use as a standalone maintenance charger or cell reconditioning device. Intended for adjacent-cell balancing only; it balances pairs of neighboring cells and relies on the pack’s charging/discharging activity to initiate energy transfer. Ensure each cell in the series is within the board’s working voltage range (2.0V–4.5V) during operation. What makes this product stand out Fast, high-current inductive balancing (1.2 A) for effective voltage equalization. Automatic, threshold-based operation: triggers only when needed and stops precisely when balance is achieved. Integrates with existing lithium battery protection systems to provide continuous in-service balancing without additional user intervention.