Function: 1. Basic Specifications: A practical 4S 3.2V protection circuit board for LifePo4 batteries. 2. Protection Function: Features overcharge, over-discharge, overcurrent, and short-circuit protection. 3. Alloy+PCB: Durable protection circuit board made from high-quality alloy and PCB materials. 4. Application: Ideal for DIY projects and school science projects, widely used in battery protection. 5. Easy to Use: User-friendly protection circuit board with a long lifespan. Specification: Item Type: 4S Protection Circuit Board Material: Alloy+PCB Charging Current: 50-150A Single Cell Balance Current: 0.07A Single Battery Consumption: 25uA Instantaneous Current: 300-900A Overcharge Protection: Single 3.65V Protection Delay: 2 seconds Balance Current: 0.07A Switch Control: Off mode, Shutdown, Power on, and Reset Overcharge Protection, Over-discharge Protection, Overcurrent Protection Over-discharge Protection: 2.5V Over-temperature Protection: 75°C. Package List: 1 x Cable Protection Circuit Board, 1 x Yellow Pad Note: Short-circuit protection is not 100% guaranteed.