It’s not the battery (although it does take an uncommon battery, a 14500), it’s the disassembly.
You need to soak the base in hot water to soften the plastic clip, then use the charging stand to break the seal and open it up. Once open, there’s a delicate metal brackets to unclip and remove. At that point, you need to desolder the battery and the motor, and then start to work on the plastic brackets. This is less than halfway through the process, and it’s likely broken.
Some things are extremely repair-hostile. I’m not happy about it, but I’m not going to spend half a day attempting a very unlikely repair.


Take a look for videos. Some are relatively straightforward. Unfortunately, we had one that wasn’t.
Honestly, a new one was only 65 bucks CDN. The profit is all in the heads now, just like razor blade cartridges.