If it works with your anker but not with mophie then you have your answer

This.
Go through the layer 1 troubleshooting steps. Try it on a different charger. If it works on the different charger then it’s very likely the original charger. Take it from there:
- if you have a case, take off the case. Does the original charger now work?
- Make sure the original charger MagSafe is clean.
- try it in a different outlet.
- if it has a changeable power cord, try a new cord or brick.
Hopefully it’s one of them that is easier to replace than the whole device. .