I figured since battery life seems to be the #1 complaint of my fellow Eris owners I would pop a thread in here that lists out loud and clear how to try and get the most juice for your squeeze. 1. KNOWN ISSUES - Native SMS app will not let the phone sleep. This has been posted and reposted, but it can't hurt to have it here again. to check go to settings>about phone>status and at the bottom awake time. if it is 100% you more then likely have this bug to fix it go into your messages app, menu>setting> and turn off notifications. go to the android market and download handcent sms or chomp sms, and install. then pick a contact and press send sms, pick your new sms app as default, and send any message. then do a reboot. once that is all done, power on your phone, let is sleep for a minute after reboot and go back to settings>about phone>status and at the bottom wake time. if it is around 50% or so the fix has worked and you should be able to charge faster and hold a charge longer. Along with this tip, the stock verizon visual voicemail app, if active it known to keep your phone "awake" there is no way to uninstall this app, just don't use it. For the below 4 settings (tips 2, 3, 4, and 5) you can easyily set toggles on your home screen to flip these on and off with one touch. Simply hold a open spot on your home screen to add widget, pick htc widgets, pick settings, then add whatever widget you want to control. 2. Turn wifi off when not using it (settings>wireless controls>wifi on or off) 3. Turn GPS off when not using it (settings>location>turn gps on or off) 4. Turn Bluetooth off when not using it (settings>wireless controls>turn bluetooth on or off) 5. Turn Mobile Network off when not using it (settings>wireless controls>turn mobile network on or off) (if both this and wifi are disabled you will not be connected at all to the internet. the only thing you will be able to do is make/recieve phone calls and send/recieve sms mesages, this will give you tremendous battery savings though) 6. Turn off audible touchtones (settings>sounds and display> audible selection) 7. Turn off haptic feedback for typing and touchscreen inputs (with keyboard up press the gear for settings>sound feedback and vib when typing OFF) 8. also turn off screen animations.(settings>sounds and display> animations) 9. Turn screen brightness down to a moderate level. 10. Turn on disable auto backlight. (settings>sounds and display> disable auto backlight) 11. You can set screen time out to 30 second, i leave mine at a minute, thing is just to remember to hit your red call end button when putting the phone down. 12. Turn off auto-sync for your google account features (setting>data synchronization>Google) 13. Conditioning the battery by letting it run all the way down and then charging it up seems to help alot. For best results, do this three days in a row. 14. It is reported that using wifi rather then 3g service from verizon uses less battery...so if you are in a area for a extended period of time with wifi avaialbe use it and see. feel free to suggest more options, i can add them to the list. hope this helps.