My non-branded GSM hero eats battery. So I decided to check some things out. These numbers are starting from 100% battery, and after a reboot - the only thing I open is settings to check the battery level, and then I lock it and leave it for 6 hours. In all cases the final awake time is low, less than 15% (because I'm doing nothing with it). Full data-sync mode - gmail sync, twitter, etc - about 10% battery use per hour. Retro mode - GSM only, data switched off - 6 % per hour. Airplane mode - 3.5% per hour - WTF?? (Awake time ~1%) Why is battery consumed when it's doing sod all?