I read that the Apple Battery Charger here to help. I bought the set and was once again on the packaging or the way Apple presents its products done.
After the function check came and I have a pair of AA batteries set in the Magic Mouse. Since then I have no more problems. If someone wants to know why this is? The Apple batteries are a bit larger than eg Eneloop batteries and thus keep better in the Magic Mouse. Since you can make Apple a reproach (Magic Mouse design flaws), the quality of the battery charger sets does not detract from it but what I forgive full 5 stars.
Nice is that you can see right on the charger when the two batteries are fully charged (to be loaded up to 2 piece). There is an LED that provides information on the charging status.
Therefore I can highly recommend the product. Really makes sense it if you have problems with the Magic Mouse, for everyone else it is a nice piece of optical equipment.