Solved Rechargeable Batteries Magic Mouse 1 problem
It's almost 2021 and I still prefer magic mouse 1 because of it's battery flexibility, the problem with some NiMh batteries is that it won't work, real culprit is the positive end of the NiMh rechargeable batteries they are shorter compared to normal batteries and cannot make the contact with the positive side of the mouse battery space. All you can do is make a tiny fold of aluminium foil just about 1mm and place it over the positive side the the mouse and then install the NiMh batteries and Voila!!