This battery save my apple magic mouse

When you change your mouse from logitech mouse to magic mouse, the first feeling is that magic mouse is much much heavier. This battery save my apple magic mouse, although it has lesser mah, but it is 5 times lighter than normal battery, so i much my magic mouse much lighter weight. And it is only $2 RMB.

TB1VDtHIFXXXXaFXXXXXXXXXXXX_!!0-item_pic.jpg_600x600