Multi-mode operation offers preset auto, charge, and discharge modes for flexible use and ease of operation. Versatile Charging Functionality Equipped with a Type-C interface for external power supply, it supports automatic charge cut-off for up to 9 cycles. High-precision internal resistance testing utilizes the 2-wire direct current method for accurate internal resistance measurement, ensuring reliable data. User-friendly design features a 1.77-inch digital display for clear display of voltage, current, power, and discharge status. Comprehensive capacity measurement features a capacity test via resistance discharge, recording the cumulative capacity, energy, and time.