Features: High-accuracy voltage detection circuit, fine workmanship and durable, effective life greater than 50000 hours. Protection: Over-discharge for Protection/Overcurrent for Protection/Overcharge for Protection/Short Circuit for Protection Short circuit for protection need to be charged to recover. Widely used for LED light backup power supply, solar street light battery pack, monitor standby power supply, etc. Overcharge voltage range: 4.25-4.35v ± 0.05v, over discharge voltage range: 2.5-3.0v ± 0.05v. Specifications: Charging voltage: 8.4V-9V Internal resistance: less than 300mΩ Maximum working current: 13A Size: 20x46mm/0.79x1.81inches Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xBattery for Protection Board