hi, i am no expert just a regular person, but i thought i would share some little ways i found of extending my battery. JUST TRYING TO BE HELPFUL. if you don't do some of these things you will have a dead battery very quickly. 1. of course you must use a "power control", i really like the one that is pre-installed. turn things off when not using them, blue tooth/wi-fi/gps.ect.. there really is no way around this, you have to get used to using power controls. 2. i have found that the "screen brightness" is a huge battery sucker on the mytch 4g. you can turn your screen britness way down and it really doesn't change the look of the screen at all. i took mine off of "auto" and moved it way down and it looks awesome. 3. i do not like my phone always "sincying" and looking for stuff. i have the sync turned off, if i want to check my gmail/yahoo mail, ect.. i just sync myself. there is a cool pre-installed app in your app tray called "sync all" place that on your home screen and with one push everything is synced. alot of people wont like this idea, but it truly saves alot of battery juice. i get tired of the continous led notifications from e-mails, i just like to be notified of texts and call and voicemails, of course that is just personal opinion. 4. ok- here is a biggie. and this will NOT be for everyone. i do alot of "regular phone calls" old school talking, and i found it was just shredding my battery. i went into settings and changed my network to "gsm only" now an "e" shows up on my notification bar not and "h". for talking and general use edge is absolutely perfect!! here in columbus ohio edge is so fast that i don't tell any difference between e or h even in the internet, and that is the truth. you will save sooo much battery. NOW, you can easily hit your wi-fi on button on your power control and be zooming thru wi-fi if you want to do super data intensive stuff. and if you want you can always go back into setting and change back to "h" only or "e" only or use both. (if you choose use both it will ALWAYS PICK "H" IF IT IS AVAILABLE).