Sponge Energy is a new generation external battery. Nowadays often happen that the at the most necessary moment your phone's battery dies, in this case your Sponge Energy will back you up and charge your cell phone. It has enough juice to charge your tablet, mp3 player or another 5V device. An external charger is very compact, but its 8400 mAh capacy enough energy fully charge a cell phone about 3 times. If your climbing Everest, or tanning on beaches in Greece or France, or simply use the gym Sponge Energy will be your backup power source. Sponge Energy battery contains two USB ports with 1A and 2A current. External battery status is indicated by 4 LED lights. Packaging includes the most popular mobile devices adapters (mini USB, micro USB, iPhone 3G / 4G / 4GS, Nokia), you can also connect your charger to charger USB cable.