Hi, I have a htc desire hd - I'm very new to android soplease forigve my ignorance. The battery is ok but it runs out in a day. I'm finding that even when I manage services like wifi, screen brightness, location services, bluetooth etc and swtich them off when not needed the battery runs out quickly. When I look at the battery usage the Android Os is always the thing using a signicant amount of the battery. Then when I look at what apps are running (setting>applications manage apps> running) I see there are lots of apps running that I haven't started or used in ages. What am I supposed to do about this. I can't seem to stop them at all.