depends on the wireless controller. After having problems with 1 of mine and spending some time reading and then calling 1-800-4my-xbox i talked to a man named alan. He was nice, and insisted he had never HEARD of a wireless controller losing connection to the xbox with a full battery. I informed him it happens to my console, and on other peoples with the 1 problimatic controller i own, and i have tried several if not all of the things i could search from the web to fix my problem, which was of course, full battery disconnects, and it was not a time interval thing, it was a person to person, it was almost as if someone mashed 2 or 3 buttons at once, the controller would disconnect instantly, and the game would freeze with the reconnect controller msg and most of the time(we were playing sports games) it would be the select sides screen automatically. What i did notice was that it was happening to different people differently. Like i can play for 10 minutes and be fine, but some friends it disconnects on them every 20 seconds. After alan insisted that he had never heard of this, and asking me such questions as "do i have the batteries in the right way" etc etc, he then went back on his "i have never heard of this and i have worked here a long time" to "well, it is probably the battery pack, it's not making or loosing connection with the controller itself at the back" which to me, seems that they are acknowledging a known issue of bad battery packs/design. He told me to return it to the store(i bought it seperatly) and gave me a referance number, said to call bakc in if i had problems. I told him i would probably have issues since i have no receipt or packaging(as they make it IMPOSSIBLE to get outta that plastic they come in). Anyway, be careful is the thing i am trying to say, as myself and others it seems have gotten bad batches of wireless controllers.