Basically, the power bank is a tool to save energy . Many also call the bank as a portable power charger , the tool to recharge gadgets when we 're traveling ( on the go ) . Ability to store energy and transfer it to another gadget to make power bank a must-have tool to support the mobile gadget users who rarely meet , or could not find a power source for downloading cas gadget . BullBerg Power Bank is a high-capacity portable charger and intelligent . Have an indicator light that shows the electric current capacity in several stages coupled with overcharge protection systems to increase efficiency . As well as having the function recondition the battery capacity of your electronic devices . This capability results from two powerful 10400mAh battery . Where can save a great power for iPad , iPhone , Blackberry and other electronic devices with pengisiian short time and efficiently . BullBerg Power Bank is also equipped with a wide variety of electronic devices port bracket to ease the conduct of charging.