Because the original battery was drained minutes to hours after charging, I chose to replace it with the following battery, which I found after some research: [https://www.amazon.de/gp/product/B01BOO9LA0/ref=oh_aui_detailpage_o01_s00|Product on Amazon]
After soldering on the new wires everything seemed fine. The battery successfully powered the headphones and I can now listen to music again. But the battery won't charge: it blinks red. The Bose Help guide says there is an error, but I can't figure out what's causing it.
Because the original battery was drained minutes to hours after charging, I chose to replace it with the following battery, which I found after some research: [https://www.amazon.de/gp/product/B01BOO9LA0/ref=oh_aui_detailpage_o01_s00|Product on Amazon]
After soldering on the new wires everything seemed fine. The battery successfully powered the headphones and I can now listen to music again. But the battery won't charge: it blinks red. The Bose Help guide says there is an error, but I can't figure out what's causing it.