Features For Protection: The lithium battery protection board suits for ternary lithium battery, the protection module enables good protection for charge and discharge. Great Security: The protection circuit works effectively for over charge, over discharge, over voltage and short circuit. Reliable Works: The charger protection module is equipped with ultra low resistance MOS, this protection board allows for 3.7V voltage and 20A high current. Extensive Uses: The battery protection module can be applied for high current such as power tools and aircraft models, providing you with stable power. Easy to Install: The lithium battery protection board modeule comes with a compact size and a light weight as well, the simple installation can be quickly completed. Specification: Item Type: Battery Protection Board Working Temperature: 50℃ Charge and Discharge Protection: 1-5s Output Voltage: 5V Single Battery Overcharge Protection Voltage: 4.23-4.28V Single Battery Overcharge Protection Recovery Voltage: 4.08-4.18V Overcharge Protection Delay: 0.5-1.5s Over Discharge Protection Delay: 0.5-1.5s Short Circuit Delay: 100-600μs Same Port Discharge Current: 25A Charging Current: 25A Package List: 5 x Battery Protection Board Note: This protection board cannot be used for lithium iron phosphate batteries. Lithium battery protection board is strictly prohibited to use in series. Package List 5 x Battery Protection Board