[Vibrant General] nearblack:
Alright, so here's how it goes. I happen to be really anal about battery life, and if I come home from a 8 hour day and I have less than 50% of battery life, it just bothers me.

So, with a bit of reading, I have my phone set up to where I get almost 24 hours of battery life. So here are the steps I took to achieve that:

Have all the basics down:

Be on the lowest brightness (because even that is extremely bright) unless in extraordinary situations.

Always use wifi over 3G/2G and use bluetooth and the GPS as little as possible.

Also don't install any task killers - they do more harm than good.

1. Flashthe Bionix ROM. For those of you who haven't done it yet, you are missing a lot. The speed of ROM is incredible and has a lot of little tweaks that will improve battery life. Don't be afraid to root and flash these ROMS - they have been throughly tested and proved to almost always solve problems instead of creating new ones! Make sure to download the Bionix ROM that runs on the J12 modem. Pick it up here:

http://xdaforums.com/showthread.php?t=782027

2. Wipe battery stats!!! This one is without a doubt the most critical. I did this and my battery life increased by more than 2X. Make sure you follow the instructions that state:

To do step 6, I had my phone at full brightness with Bluetooth and GPS on, with Pandora running all while recording a HD video. It drained it pretty damn quick lol.

3. Install Autokiller from the market, and apply the Aggressive preset. This will really lower CPU usage, and really speeds up your phone. This is NOT a task killer, this just allocates memory more harshly.

4. Install JuiceDefender, and have it enabled at all times... A lot of people have had mixed results with this. Mainly, it will turn of data while your phone is asleep, but turning data on and off is a battery drainer. Juicedefender will automatically recognize what settings will produce the most preservation of battery for your phone, so leave it at the default settings. It all depends on how often you use your phone, and what your data connection is like in the areas you reside. It does great things for most people, so I really suggest you try it out. Make sure you download the "battery" version and not the beta.

5. Have all apps/widgets that regularly stream information to the lowest interval possible. Let's be honest, you don't need your Facebook widget to be refreshing every 5min, so set it at an hour.

With all this done, I am at this very moment at 44% battery with a little over 13 hours of use. Even if I had my phone asleep the entire time, 24 hours is a lot better than what most people would seem to get. My day usually consists of 20min of talk time, 30 min of texting, 40 min of browsing, 30 min of gaming, 1 hour of music playing, and a bit of picture taking/editing. My phone is asleep for a long periods of time while I am at school. Yes I don't use my phone as heavily as some do, but if it guarantees me a full day of battery, I don't mind too much.

I don't really see how this can't work for others. We have the exact same hardware, and the exact same battery. You may use the phone more than I and pump out a few hours less, but still get over 15 hours.

Hope this helped!