Highlight: Over-discharge protection, overcurrent protection, overcharge protection, Short Circuit High-accuracy voltage detection circuit, fine workmanship and durable. Usage; massager battery pack, LED light backup power supply, 12V electronics, solar street light battery pack, monitoring backup power supply, and other products. Over voltage range: 4.25 4.35±0.05v Over discharge voltage range: 2.3 3.0±0.05v