Now I can honestly say that some problems do not quite understand. I have the mouse now have significantly longer (since the first appearance, ie mid-2006) - good at first the mouse wheel was right in front of the first use of defective so immediately get a new, but the runs ever since with no problems. The receiver plugged into my G15 (old model) which easily provides enough power for it. Well, the second wheel is somehow very sensitive, but I use anyway because `s never consider to be meaningless. The more often I use for the new wheel with the automatic free spin feature and Google's hotkey, these two functions alone pay off after a short time) I can About the battery life I still do not complain, 4-5 days it keeps loose by and although I squat the most of the time of day on the PC. It is still well in hand, much better anyway as my old MX 700 (which today is still my brother in operation for the rest, and I've also appear since her!) Who have also exchanged only because I once again What was new. So I can only speak for the quality of Logitech for my part after such fabulous devices. Of course you can see her now the "battle scars" something, ie the paint on Logitech character is something from which points where the clicking finger most frequently sit shine a bit more than the rest, the magnifying glass on the Google button are gone - the usual stuff after 3.5 years intensive use (and for a still unbeatable price of 60 at the time: D);)
Ps: The charger initially worked without a hitch, according to ~ 3 years, she then began to make and to load the mouse only in specific positions so slow on some issues. Simple solution: go Just a piece of sandpaper on the gold contacts on the bottom of the mouse, I mean after all pushing one this year for more than a sometimes more, sometimes less polluted Mouse, is clear that the not so positive effect on the contacts. PPS: Every now and then my function is to the driver by itself, it is set to Automatic freely rotating wheel and simultaneous use as 3rd mouse button. From time to time (but not very often) it comes just before the I want to use the middle mouse button and turn instead manually in the free spin mode. But that's not so bad, just once went briefly into the driver and off we go again.
