General description The Battery Case Storage Box Shell PCB Charging Board is designed for 5 series Li-ion batteries, primarily used in electric power tools. It features a specialized IC that monitors real-time voltage, charge and discharge current, and ambient temperature for each battery, ensuring stable protective functions during operation. Technical specifications Type: 20 cores Charge Voltage: 21V Single Cell Charge Voltage: 4.25V Continuous Discharge Current: 8-20A Overcharge Detection Voltage: 4.25V Working Current: approximately 25µA Quiescent Current: approximately 6µA Material: Plastic Compatibility and accessories Suitable for Power Tool Note: (18650) battery cell core is NOT INCLUDED in the kit Other information Package Contents: 1 set x battery shell Measurement allowed error: +/- 1-3cm Color may vary slightly due to light reflection and different displays