I own a dual-booting HTC-HD2 with MIUI on SD card.
I already knew, from tutorials, that in order to maximize battery life I should first-boot Android only with 100% of charge.
This is currently unclear to me. First, I run Windows Mobile 90% of time, and I use Android occasionally only for some programs that are not available in WM.
It happened that I needed to boot Android when on the street, with less than 100% battery. However, I recently noticed that my battery is descharging really fast, for example today from 7:30am to 10am it ran from 100% to 68%, and I really wonder if it could have lasted till 8pm (when I get back home).
Is it because Android should always be booted with 100% of battery, or because I run 24/7 Skype and Windows Live Messenger in HSDPA from Windows Mobile?