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One person found this helpful
Ok, but does not deliver the full 2.5A to a single port.
on 11 October 2015
This charger is probably fine for lots of small devices, but for a single large tablet (such as an iPad), be aware that it will not charge the tablet for the full rated 2.5A at 5V. Using a dedicated single USB charger rated for 5V at 2.5A, I saw a supply of 5.05V at 2.1A. With the same cables switched to use the PortaPow, I saw 4.97V at 1.5A, which means teven allowing for cable and connector resistance, the PortaPow does not supply the full rated output to a single USB port, which in turn means your iPad will not charge as fast as it could.
If you have 3 or 4 phones to charge, the PortaPow is probably a good choice. For a single 10 inch tablet, I'd be tempted to look for a 2.5A USB charger with a single output, because then you get the full output charging your tablet.
Fair disclosure: I measured the output using product B011ICFV4I (enter this in the Amazon search), using the same cables and same tablet for both power supplies, so its a falr test.