Mouse works fine but for the scroll. It won't scroll horizontally or vertically. Sometimes I get a very slight vertical movement, but that's it. Right click is also temperamental. It appears to be trying to scroll the screen when not in use but moves only very slightly.
* All the accessibility and mouse settings are set to scroll.
* Still fails when connected to another mac that has a working magic mouse.
* Tried loads of different batteries.
* Battery terminals clean.
* Tried off and on, pairing and removing.
* Tried with single and multiple fingers.
Seems to be a hardware problem, but I don't know which part is failing to fix or replace it.