The Power Bank 5.0 will charge two of these devices at once. It contains a 2.1 A output for charging your iPad® or other tablets and a 1 A output for smaller electronics such as your MP3 player. When the power bank 5.0 needs to be recharged you can use a laptop, the AC adapter. The power bank 5.0 will charge the average smartphone up to three times before it needs to be recharged.