Jackery Battery Help Requested

 Hello to All!  Today I am asking for help.  Some time ago Dear One bought a small Jackery battery for me to use with my sleep help at bedside.  I plug that helper into the Jackery and the Jackery into the wall so it is always energized.  We do have solar panels to plug into the Jackery in case the power goes out, which it has done a few times since we have been here...which is why he purchased the Jackery for me.  (I become very crabby when I don't sleep and I don't sleep without that sleep equipment...)

Now to the question:  This week, with nothing changing, at least I did not change anything, the power is not getting to my sleep aid;  Does anyone have any ideas what might be wrong and what I can do to fix it?  I can, and have, plugged the sleep plug into the wall but that defeats the purpose of the Jackery.  

Thanks so much for suggestions!

This is the Jackery.  When we first acquired it, I had the DC current selected and nothing worked.  When I realized that I had to select the AC it worked like a charm and has done from that time until three days ago.

Thanks for any suggestions.