i've got my partner's desire hd and he's got mine coz his battery is flat. His phone never lasts a full day on a full charge and i've noticed that every now again, car navigation just pops up and lights up the screen. I think this might be draining his battery. I've been through the settings and there's nothing on there that tells me why it is doing this. As far as i can tell my partner has never even used this app before. Any ideas? Ta x