[HD2 Android SD Development] RobE.:
Hiya Cope, We both know that luck has nothing to do with it (but thanks for the sentiment though). :)

I'm CERTAIN I'm missing something, and maybe more than one thing. I would appreciate some help or advice.

My wifi is always off - unless used briefly for a specific purpose (like syncing VCOrganizer Pro, locally to my desktop), and then it's immediately turned off.

My BT is always turned off - unless I'm using my BT headset, which is infrequent... and once I turnoff the headset I always turn off the BT radio.

MY GPS is always turned off - unless I'm using it for a specific purpose, like, in-car navigation (which is infrequent). When I'm done the GPS radio is off.

Screen brightness is purposefully set low, I seldom use the Auto setting - still I'm pretty certain the display is one of, if not the, main culprit.

I've been using the Battery Calibration App (from the market) for about two weeks now. I cycle between three batteries, always kept charged. The original plus two non-oem replacements.

I've recently (so as to help myself figure this all out), taken to using JuiceDefender (free) from the market, and might buy the full version as well. I've also installed Watchdog lite, and... Battery Monitor Widget (an excellent app), I'll soon purchase the full version. I'm getting a lot of good usage info from BMW.

Cope, I've been building and sometimes OC'ing, High End Windows computers for years. - I will not overclock my HD2, but I have taken to underclocking it a bit, and also experimenting with the different Governors to see how that change might influence overall performance and battery life. I purposefully err on the side of being conservative. I've also taken to somewhat limiting the CPU scaling. My guess is this might conserve some battery life - but it's an experiment of sorts, and I am uncertain, so I'll see in short order the effects of this.

When I'm not using my HD2... it's cradled and charging. I always have a spare battery. When I know I'll be out with it a while, I always keep a spare, and a home & car charger when traveling. I'll never run out of juice... but still, my battery life isn't great.

I've been upgrading my last few rounds by leaving the old data.image file in place. Never a problem... but I recall reading someone's suggestion that the change to GB 2.3.5 might have better performance from the new build, with a new data image file. So this I've done (and I think its helped). I didn't re-use the old data.image... I just restored my user pgms with TB.

So, I'm doing what I can - I'm still a bit mystified. Also I think (perhaps) using too many Widgets on too many (7) launcher screens, is certainly detrimental to my battery life. Yeah, I'm a relative Android noob - but learning fast!

(and I'm a pretty humble guy, so it's hard for me to claim this - out loud, but), as a PC builder & user in general, DOS before that, and SCO Xenix & CP/M before that, and a little TRS/DOS, thrown in courtesy of my bro... I'm probably one of the more experienced computer users on this forum.

I'm also detail oriented but never once is it lost on me that there is a whole world of folks - some of them here - who've forgotten more than I'll ever know. As a general user... I'm not too bad ;) I'm actually much better than, not too bad. :D

but seriously, I do have some battery issues and I'm trying, and so this post to acknowledge yours.

Cope... I really (REALLY) admire you dev's and programmers. I never had the time or took the time to learn that end of it. But, from a PC and PDA user perspective, there's no noob here.