Well iv had this wireless mouse for over 4 years now and it seems to me that the range of my mouse is getting smaller and smaller, I use Duracell Ultra batteries and they used to last for a long time but over the past few months I find the battery life has been dwindleing and that even when I put new batteries in the mouse the range still is really small, now my question is: do wireless mouse's get more redundant over time, do I have to buy a new mouse?