Li-ion Battery Tool 5S Board with 20A Discharge Current, 18V 21V Circuit for DIY Electric Tools and Bank - PCB Only

Li-ion Battery Tool 5S Board with 20A Discharge Current, 18V 21V Circuit for DIY Electric Tools and Bank - PCB Only

• 5S 20A 18V 21V: Advanced circuit board designed for Li-ion battery packs in electric tools and banks, supporting 5S configuration with 21V charging voltage and 8-20A continuous discharge current for reliable Overcharge and Over Discharge : Integrated safety mechanism detects overcharge at 4.25V per cell with 1S delay and recovers at 4.13V; prevents deep discharge by cutting off at 2.8V per cell with automatic recovery after load removal
• High Current & Short Circuit Defense: Supports up to 30±5A overcurrent detection with 1S delay and automatic reset; features short circuit with 250uS detection and 1S release delay, system stability under fault conditions
• Temperature and Low Management: Activates thermal cutoff at 70±5°C during operation and resumes at 55±5°C; maintains -low consumption of 6uA in sleep mode and 25uA during use for energy efficiency
• Compact for DIY Projects: Measures 89*64mm with 30±5mΩ internal resistance, suitable for custom battery builds; compatible with applications requiring stable 18V–21V output and -purpose integration