Wireless Adapter Power Issues

[ParagonAG]

I've been having this issue where the wireless adapter doesn't seem to get power from the battery. I reached out to Vive support and they thought it was the adapter itself, so I sent it to them to get repaired and I just got it back but it still has the same issue.The headset itself works fine on a wired connection. Does anyone know a fix for this?

I'm guessing that maybe its the battery. I've tested the battery by charging my phone with it and it works but it charges it very slowly so maybe it just isn't putting out enough power anymore? If thats the case then does anyone know of a good replacement battery? Not really trying to spend 70 bucks on vives official battery.