Hi
Sadly there aren’t really any repair guides of the Magic Mouse however,this isn’t really recommended be on eBay there will be lots of faulty ones you can use as a donor so if your up for a challenge find a YouTube video or follow a teardown and see how far you get
Like I said previously this isn’t recommended but it’s up to your self if you want a shot and if you need any advice please do not hesitate to ask
Thanks:-)