iPhone does not charge on powerbank??

[J. A.]

A button isn't necessary. Mine works without.
Just make sure you get a powerbank which can charge an iPhone 6 (plus). Not every powerbank can do that.

 

[peteandrewd4t]

What branded powerbanks are you guys using?
I'm using a iHave Boss 10000mAh, Vinsic 10000mAh and OnePlus 10000mAh.

 

[J. A.]

A Mophie 2nd generation juice pack power station with 4000 mAh

 

[bear7962]

My Jockery Bar has a button. It works fine as does the generic lipstick power bar I got for my small purse, which does not have a button.
Jockery Bar is5600 mAh super high capacity 5V
The generic is 3000 mAh also 5V
Both work with my Apple charge cables as well as with the ones that came with the charges.
Not sure what the problem is for you. I do have a 6 plus.