Battery is terrible, built in and about 24 hours of usable life. The software to set it up is really bad and unituitive - the g502 wired software was better.
WHY THE CRAP CAN'T I SAVE MY MACROS TO ONBOARD MEMORY? This was why I bought an upgrade, to take it between machines. But my macro's only work with the LG software running. This is useless, and a HUGE downgrade from the 502 wired which CAN save macro's to the mouse.
Very dissappointed I spent 200$ on this basically useless mouse.