ITEM NAME:3S 25A protection PCB board W/balance BMS for 18650 Li-ion lithium battery c Ew Specification: Brand new Size:see in the picture Over voltage range: 4.25-4.35v ±0.05v Over discharge voltage range: 2.3-3.0v ±0.05v Maximum operating current: 0-25A Maximum transient current: 34-40A Quiescent current: less than 30uA Internal resistance: less than 100mÃŽ © Working temperature: -40---+50℃ Storage.1 x PCB Protection Board(Battery is not include). The internal resistance of 3 battery capacity are closer will be better. The capacity of the battery internal resistance is closer will be better. Short circuit protection: Yes, delayed self recovery.