Compact, strong, and a small cover is provided to protect the pockets or bags. This cover allows more to put the necessary cables. No buttons to press, just plug the device for charging begins as if it were plugged into an outlet, and it is super convenient because not need all out! just leave accessible end of the cable to connect to the phone or tablet and hop is functional. At night, as the day of, besides the LED lamp can also help (even if our phone do, if you want to recharge it often is not the time to go the LED lamp of the phone ... - )) Level autonomy is ensured top several refills for my phone (4S) and at least one complete my ipad. I have not found self discharge significantly. That's positive ... We can use the 2 ports simultaneously even if I think it is not advisable, it can always help ... 2 amps are impeccable. This is my third mobile battery and it is the most effective and functional ...