Yeah, I have bought some of the lower end combos and the batteries die within a couple of days. My Microsoft intelli set lasts for at least 5 months or so. Here?s what I?ve determined, the lower end sets are constantly sending signal or receiving signals from other interferences. I often come to my GF's computer finding a right click activity or it mysteriously waking from the scr.
Also, i had a customer wanting wireless for their employees and did not want to pay, so i offered up 10 of these cheap sets. Bad mistake. Everyone was controlling everyone?s mouse and keyboard. It was totally chaotic. So i decided to leave two in play, the manager?s office and the warehouse station; literally 100 feet apart with walls in between, and no way, they were still affecting each other. So not only are they constantly on, they give off some serious "wattage".