I really love Apple’s Magic Mouse but, I was getting tired of what always seems like changing the batteries in the thing. So, I bought Mobee’s Magic Charger which I am pretty pleased with right now. I would recommend fully charging the battery before installing it in your Magic Mouse (I had just put the battery right in & it was frequently loosing the connection) but, after fully charging the battery I am no longer noticing that issue. I will note that you will notice the the mouse feels noticeably lighter with the new battery pack.