The RAVPower 22000mAh external battery pack is simply a power monster. I am on the go daily with a mobile phone, tablet, laptop and even a MiFi. No mater where I go I see folks fighting over power plugs. Those days are over with this external battery pack charge 3 devices at once with a combined max of 5.8 amps or a max of 2.4 amps each.. With plenty of power in the battery to do numerous rounds of charging.
I keep this battery pack in my car, it always has 3-4 days of power to charge up devices that are running low. @ $39.95 you cannot beat the price on this 22000mAh capacity external battery pack from RAVPower.