Android phones generally don’t get a lot of battery life. Judging by some of the forum threads and blog posts I’ve read, 20 hours or so is about the average. With the stock I’ve occaisionally had it scrape past that, but not by much. Using a lighter-weight Sense-based ROM I was able to get around 36 hours of charge

If you switch the Desire HD to a ROM without HTC Sense (such as CyanogenMod 7)you’ll find your battery life reduced even further. There is a battery drain issue with all custom, non-Sense ROMs for the DHD, due to a bug in the open-source code controlling the aic3254 chip used for processing sound (the closed-source HTC driver doesn’t have the issue). Once the chip comes on it doesn’t switch off, consuming power at a steady rate. Continue reading