the camera is C410 wire free camera connected to the solar kit. The camera was purcahsed in sept last year

The camera will not charge from the solar panel. It was working but one day the panel could not keep it charged and it went completely flat. After which the camera would not charge from the panel at all. I then plugged it into the mains to charge and it would take all day to get to 13% and not charge any further than 13%. once it was disconnected from the mains it would discharge withing a few hours.

I have left it charging for 48 hours but will not charge further than 13%

What can I do.

I have reset the camera and that had not effect