Description: Battery Type: Li-ion, Battery Volt：7.4V, Battery capacity: 1500mAh 15C.The long runtime makes this an ideal hobby battery pack for better longevity. Battery Size : 67 x 37 x 19mm ,widely fits for RC Toy , Household Electric Appliances , Lighting Equipment Etc. Note: make sure your device battery is same plug and same size and same voltage before your purchase. Smart USB Charger : The charger is equipped with a built-in smart chip to prevent overcharge, overload and overvoltage, and the indicator light shows the charging status (the red light flashes when the charger is unloaded, the red light is always on when charging, and the red light is off when the charger is fully charged). Features: .