Hi guys not posted on here before but thought i'd share this. I recieved desire hd 3 days ago, let power run out then fully charged then took to work, after 6 hours of no use (cant use at work) it died on me!! was gutted. so came home fully charged again and installed an app called battery booster went through settings and then left off charge to see how long it would last, well after 48 hours (yes 48!!) it now has an amazing 78%!! charge left. i must admit i have not used it much but have played a couple of games and checked facebook etc. ive turned autosync off and screen brightness to 25%, wifi set to turn off as screen is turned off etc. i also have a hero and installed app on it too and it does vastly improve battery life on that too.