By cons, there are two USB ports but what is not said is that there is a socket 1A and 500mA, so to charge two mobile phones at the same time it does not. If you plug a phone jack on the 1A, phone. indicates that it is charging, but after three hours, the laptop gauge did not move. So that should you charge a specific type of device may be tablets.
This 5000mha battery allowed me to watch video on my Dell Streak for 9 hours non-stop and got the battery from such was full, I could even charge another phone of a person who had stowed away his charger during the trip.