I did the same thing to mine; works fine now.
My Bose Soundlink MIni I was also having the problem that it just would not hold a charge beyond 15 min and would then shut down. I called Bose about the software/firmware update that people talked about on this site which needed to be done to the speaker. Bose checked my serial number and stated that there is no firmware or software update for the Soundlink Mini 1, only the Mini 2. I had a Torx 8 bit and removed the rubber plate on the bottom of the speaker to check the model # of the battery and ordered a new battery from Amazon for $47.50. I then put the old battery back into the speaker with the Torx screws and turned the speaker on. Immediately got a Green light for full charge of the battery (it had been playing on plug into outlet all morning). I’ve now been playing the speaker with bluetooth to my phone listening to an iHeart radio station for 4 hrs and checking the speaker power, it’s still showing Green. Now I’m wondering if the battery was ok, just needed a reset.
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