Just to clarify/confirm comments from others on the slow iPad charging. Even tho the iPhone and iPad chargers look identical, they are definitely not. The insanely small writing on each will show that the iPhone chargers are 5V@1amp, where the iPads are
[email protected]. There are some variations ... older/smaller iPads will be 2.1 amp.
Point being people see the charger is identical in every other respect and simply assume that they can use iPhone and iPad chargers interchangeably. I actually think thats a fair enough assumption given how Apple has presented them. However using an iPhone charger on an iPad will not only charge extremely slowly, but it may very likely only charge the iPad when it’s not in use. The screen and general use will be enough to take all the charging input from an iPhone or other 1Amp charger - I’ve even seen iPads go flat WHILST on such a charger.
I have put a small mark on my iPad charger so I can tell them apart. Also explains why dual-USB wall power outlets you can get are often marked with ‘phone’ and ‘tablet’.
So any charging station you get may not need all outputs to be at 2+ amps, but should have at least as many high current outputs as needed for your larger devices. The rest would be fine at 1Amp for phones. I agree with the previous comment to check the specs to see if the output is shared between all the ports (a bad thing). Each port should run it’s rated output regardless of whatever else is plugged in.