Q: charge iPhone 5s from power bank

You can use either, the phone controls the amount of power it uses, not the other way around.

Both ports will work but i suggest you use the 2.1 Amp. The 2.1 Amp port will allow your phone to charge faster than the 1 Amp.

Well, plugging a tablet into the 1 amp port would be an exercise in frustration. But, it doesn't make a whole lot of sense to me that the manufacture would bother setting it up that way. I have a mophie power pack with two USB ports. They are exactly the same. No suggestion that I should use one for one thing and the other for another.

andrewyarbro19 wrote:

 

Both ports will work but i suggest you use the 2.1 Amp. The 2.1 Amp port will allow your phone to charge faster than the 1 Amp.

And iPhone 5S will not charge any faster on a 2.1 Amp port than on a 1 Amp.

muso181 wrote:

 

Thanks for this. What are the different outputs used for then?

iPads require more wattage

I think the reason the two ports are different is if you use both at the same time you won't overload the powerpack. I have 3 power packs, all different. They all have a 1 amp port, a 2.2 amp port, and  one of them also has a 500 ma port, and both (all 3 on the last) can be used at the same time (so I can charge my iPhone, my iPad, and my BT headset at the same time).

I'm looking at the box for a mophie XL which is what I have. It has two 2.1 ports. I've never been told not to charge two iPads at the same time but nor have I tried to do so.