I just helped someone with the same issue earlier, there's a thread that can help you out...
I am having extremely good battery life personally. (I'm currently on stock ED01 updated via OTA.) There's a thread to help you try and sync your battery for better battery life, I'd give it a try and see if it helps. It worked great for me, my phone lasts over 24 hours with average use without going below 30% battery. Here's the thread:
http://forum.androidcentral.com/ver...8399-how-discussion-improve-battery-life.html
Edit: Don't worry about the terminal emulator part if you're not rooted (completely stock) Just do the charging part at the beginning. Charge to 100%, turn off let it charge to 100% while powered off, then turn back on and let it charge back to 100%. I recommend the part about draining your battery down to 2-4% after you have charged to 100% then recharging to 100% once more as this will sync your battery with your phone. Like I said it worked great for me and my battery life is amazing! Just be sure to read the information in the link to better understand the procedure.
Good luck!