At first I liked it, I loved it, especially its small size. But I was soon surprised that within not even 24, provided the battery was already empty! I told myself then that it probably came from the supplied battery that should not be full ... So I change the battery, the next day the same result! How can such a small mouse have as much appetite ??? Even turning off the small button on the back when not in use, it does not make much sense, because when it is used, the interface is much too low !!! A real SHAME by me. I am really disappointed with this purchase.