The Li-ion 40Ah/29.4V Portable Battery Pack is perfect for powering your portable radio or other electrical device. This self-discharge rate is very low, making it a great backup power supply. Finally, the battery pack has overcharge protection, overload protection, overcurrent protection and short circuit protection to keep you safe. The battery is packaged with a suitable charger. Battery Size: 130 x 58 x 68 mm. Weight: About 1 kg.