eatures: 1. Adopt high quality electronic components to ensure high precision of voltage detection and current control, improve system stability and efficiency 2. Compact size design, does not increase the overall weight and volume of the battery pack, easy to integrate into a variety of equipment to save space. 3. Provide clear wiring instructions, users can easily install on the battery pack, no need for complex setup, ready to use. 4. Built-in equalization circuit can balance the voltage of each battery during the charging process, ensuring that each cell of the battery pack can be fully charged, improving the overall performance and life cycle Parameter: (Single) overcharge voltage: 4.225V±0.025V (Single section) overcharge voltage: 4.175V±0.03V (Single section) Over-discharge voltage: 2.7V±0.05V (Single section) Over-discharge voltage: 3.0V±0.08V Over Temperature Protection: -10& 8451;~+70 15A: Discharge continuous current limit: 15A±1A Discharge protection current limit: 20A±1A Charging limiting voltage:: 12.6V Charging continuous current limit::10A±1A Charging protection current limit::15A±1A 20A: Discharge continuous current limit::20A±1A Discharge protection current limit: 28A±1A Charging limiting voltage::12.6V Charging continuous current limit::14A±1A Charging protection current limit::20A±1A 25A: Discharge continuous current limit::25A±1A Discharge protection current limit: 30A±1A Charge limiting voltage::12.6V Charging continuous current limit::20A±1A Charging protection current limit::25A±1A 30A: Discharge continuous current limit::30A±1A Discharge protection current limit: 40A±1A Charging limiting voltage::12.6V Charging continuous current limit::25A±1A Charging protection current limit: 35A±1A Attention: Package include: Lithium battery protection board *1