I consider myself a medium user, and I've gotten 26 hours out of a single charge before it shuts itself off. Today, I talked on the phone for 80 minutes in one call and don't consider the drop in battery to be beyond what I'd expect (it was at 60% at the end of the call, but I didn't make note of it before I started the call, but that's around what it usually is at that time of day), and I bet I won't need to charge it for another 12 hours. I am using Power Manager. - Andy Bakun

Compared to the Samsung A900 I had previously, the Android battery life is awesome. I could barely get 10 hours of on-time out of the A900, even if I never made call on it. - Andy Bakun

I usually get 2-3 days from a charge, but I just randomly check my email. I think the trick is to use Power Manager to disable stuff you don't need and to disable auto-sync for everything. It's easy and fast enough for me to hit refresh to get my email. - John Mueller

Yeah, I did let it run down twice before charging it again when I first got it. It's 2009, not knowing you should do that with a new battery is like not knowing that you should shake orange juice before you drink it. - Andy Bakun

Does running down the battery really change anything with the battery or does it just calibrate the charge-state-meter? In other words, is it just for cosmetic reasons? (I've always been bad with batteries, but why can't they just do this at the factory?) - John Mueller

I use 3d/edge fairly heavy through the day, on breaks, lunch, etc.. and have enough battery life to run on wifi through the night, but that is about all I get.. one full day of moderate to heavy usage. I use it more as a computer than a phone. Not horrible, but it would be nice to not have to remember to charge every single night. - Tim Hoeck

I only have my G1 a couple of days now, but I already see that using the Power Manager app is really benificial in saving battery power. Having 100% at 9 o'clock this morning, using the G1 a lot of times during the day (downloading and running apps over GPRS and WiFi, Twittering et cetera), 12 hours later I still have 63% power left. I think I should be able to do max 2 days with one charge. My previous model was a SE K800i, recharged that on average 2 times a week. - Marc van Waardenburg

a couple of weeks ago, i calibrate the battery by letting the phone run down to 0% battery and turn itself off, and charged it for 5 or 6 hours (turned off). and try it after 2 days again, it should calibrate and condition the battery life. - Pınar Yanardağ