I've been searching all over this forum as well as the internet on how people are using their HERO and the battery performance they're getting out of it. I've seen answers from 9 hrs with heavy usage to 36 hours with minimual usage. That's about all the detail I've been able to find. (Maybe I'm just not good at searching?) With that, I decided to do a little tracking of my own. I logged my usage and battery performance over a 27 hour period and thought I'd share it with the community. Not sure if this is even helpful but maybe it'll provide some sort of baseline for others to compare against. I recorded the battery level in % based on the stock battery meter, the time I recorded the battery level and any activity that occured between the current time and the previous time recording. For example, between 7:00AM and 10:19AM the battery dropped by 10% and I had received 2 emails, 2 calendar reminders went off and I had surfed the web for about 10 minutes. **** Periodic Breakdown **** Day 1 100% 7:00AM Unplugged from wall charger 90% 10:19AM 2 emails, 2 calendar reminders, 10 mins surfing 70% 1:21PM 30 min call, 8 emails, VM, 5 txt msgs 60% 3:06PM 3 emails, 2 txt msgs 60% 4:04PM 4 emails 50% 5:01PM 3 emails 50% 6:35PM 5 emails, 15 mins surfing, Used Google maps to check traffic 50% 8:10PM 50% 9:43PM 40% 10:35PM 2 emails Day 2 30% 7:00AM 5 emails 30% 8:29AM 15 mins music player 30% 10:15AM Used Clock Timer - 21 mins, 5 mins, 2 emails, 2 calendar reminders 30% 10:16AM Plugged into USB port to recharge **** General Usage During that period **** Gmail Push Sync ON - 24 emails (NOT syncing Calendar or Contacts) Hotmail Poll 4 hr interval - 8 emails Other Email Poll 4 hr interval - 1 email Yahoo Poll once a day - 1 email Bluetooth ON - only connected for 30-40 mins total while driving WiFi OFF Built in People app has Facebook updates set to NEVER Android Facebook app updates set to NEVER - not using widget either Analog clock used on homescreen No weather widgets on any homescreen Total run time on full charge: 27 hrs, 15 mins with 30% left. 88 hrs uptime 12 hrs awake (13.6%) at time of plugging back in to charge (USB) The other reason I decided to do this was to test just how much battery power Gmail with PUSH ON was taking up. Based on my findings, I seem to be getting decent battery life with what I would call 'normal' usage. I realize it's not a great deal of email being pushed in one day but I think it's probably what the average user may get. Based on this, I'll probably migrate all my mail accounts over to Gmail so I can have the Push feature and not worry about having to Poll multiple mailboxes. Hope this is helpful to some of you out there. Regards.