Sponge Energy is a new generation external battery. Nowadays, it often happens that your phone's battery runs out at the most necessary moment, in which case Sponge Energy's backup power source will help you, which will charge not only your mobile phone, but also your tablet, mp3 player or other electronic devices. device. The battery has two USB ports (2.1A and 1A), which will allow you to charge two devices at the same time. Internal Sponge Energy 20,000 batteries are characterized by their quality, durability and large capacity.