i managed to nurse my desire hd to nearly 5 hours of display time and from 6:00am to 8:00pm off charger. And 3g was on most of the time. Dont complain. that is good. A hint is to download a screen filter that basically makes your screen slightly less bright. you can control it. Just dont set it to 100% or you may have issues lol I got rid of my DHD though in favour of the Galaxy S2. and while the S2 is a different beast, the DHD is still one of the best phones ever. I miss many aspects of it. But mine was too glitchy. Probably not a consistant problem.