My previous phone was a Dell Streak and I used Juice Defender to improve my battery life. Unfortunately Juice Defender just doesn't seem to run right on my Note. My usage may differ from what everyone else's is, but I only have my phone charge during the day at work. I installed Llama and scheduled it to turn off wi-fi when I'm not at work or home. Then I set it to turn off all data from 11p to 6a when I'm asleep. I'll leave work with 100% and get back to work in the morning with 75% still available. I also use Llama to set the lock and auto adjust brightness of the screen when I'm away from work or home. Really digging what this app can do and just wanted to share with everyone, think it's worth checking out.