Light keeps shutting off

I haven't charged my Birdfy in a while because it was plugged into the solar panel and that just never worked, and I eventually got irritated and stopped with it. But trying to charge it now and the blue light only stays on for a few seconds? I re-paired it with my phone and that worked fine, but then the light shuts off. A USB-C will only fit in the camera port and will no longer fit in the back port. I looked at the Birdfy troubleshooting guides, but I'm thinking this could be just kind of broken?