Also Mophie.Besides Anker, Belkin is also a very good brand.
I had the same issue with my work phone while other devices charged with no problem.Are you sure the lightning ports just don’t beed to be cleaned?
I was having a hell of a time with the lightning port on an iPhone, and one I went in with pipe cleaners and a needle, and picked a bunch of lint out, the port started working well again.
This is probably the reason for some of the expensive lightning port cleaning kits on Anazon etc.
Cleaning the port does seem to be a necessity.
You may also need to blow it out with compressed air every day or so.

A plastic fork tine sanded down a little bit works good for cleaning a lightning port.
I used a tooth pick either the plastic ones with floss or just regular wooden or bamboo ones they fit perfectly. All you have to do is pick out the lint or dust, not scrub it hardA plastic fork tine sanded down a little bit works good for cleaning a lightning port.
A plastic fork tine sanded down a little bit works good for cleaning a lightning port.