This high-precision charge/discharge testing system is specifically designed for battery cells, featuring rapid dynamic response, high stability and accuracy, and flexible multi-channel configuration; it supports pulse testing, cycle life testing, and real-world operating condition simulation. The system incorporates multi-channel input and energy recovery capabilities, significantly reducing the electrical energy consumed during charging and discharging. It utilizes a bidirectional high-frequency DC conversion topology combined with high-performance, multi-channel 24-bit A/D converters, achieving higher sampling resolution than traditional single-range equipment.