Mine doesn't even last 7 hrs anymore i need mine plugged in now the battery lasts only 30 min. I'm never getting another corsair mouse again. I like the mouse but I've had to many problems with it first is desyncs form the wireless and i end up plugging it in wired and plugging it back into re-sync it to the receiver this is a horrible mouse!!! Ot does this in the middle of a game which is not good! I also have a k63 wireless keyboard that o have no issues with but the mouse my god I'm looking into getting a razer, Logitech, or the Redragon M801 which my friend has and has no issues with and lasts him a good 12-16 hrs I had a Logitech Master 2s before this mouse and that battery ligffe was great is why I'm thinkingg of getting a logitech