It's the worst kind of e-waste, it's only waste because someone decided I should buy a whole new vacuum when the battery dies, but Valetudo is otherwise good. Just never try to look for support at all.
I did the same for my wife's cordless vacuum, and it works better than new, because the new cells are about 2x the capacity of the originals.
Imagine having a blowtouch that you can't extinguish or touch which is likely rolling around.
"Hey, the worst case is that you get jets of super-hot flames that are impossible to extinguish!"
Otherwise you're just creating a fire hazard.
I meant soldering onto the pre-welded tabs that come with the new cell (unless you have a spot welder). You don't need much soldering experience for that.
>and know details about cells like which ones have in-built protection.
It's highly unlikely that the individual cells would be protected ones. Manufacturers are not stupid to pay N times the cost of a management circuit.
This is absolutely his right and perhaps his intention to keep the project small, but in that case I wish there was another alternative vacuum firmware project.