I wrote this to share in hope that others may find my experience useful. Sorry if something like this has already been posted. Basically, I had noticed very poor battery life with my Bionic from the start. Average life was about 3-5 hours and found myself always "jonesin'" for an electrical outlet every where I went. The frustrating part was that the majority of battery drain was when my phone was idle. I got the extended battery and maybe got 2 more hours, but not very impressive. Even shutting off 4G did not really improve life. So, here are a few tips I found helpful. I have an extended battery and recently had my phone on for about 13 hours and had 60% battery life, and I am very happy. 1) Shut down 4G when not needed. I downloaded LTE Switch (free) and it is simply a shortcut to the settings. Let's face it, you don't need 4G for calls, text, and emails. 2) Use battery saver mode. From the homescreen, press menu > settings > Battery & data manager > Battery mode. I think keeping this option on has been the greatest extender of battery life. This works for me because I may go 1-2 hours during my day without using my phone, so it is useful to just disconnect from data services when idle. 3) Turn off wifi. I only use wifi at home, so I just turn it on when I get there. Also, I noticed that if I left wifi on when there was no wifi, my battery drained faster. You can use apps such as Locale or Woofi to automate this based on location. I have found some of these apps to be hit-or-miss and not always work, so I just do without. I have not tried these services on the Bionic, so it could have just been my old Droid. 4) Turn off bluetooth. I only use BT in my car, but I always forget to turn it on/off. So, I bought Tasker from the market and created an event that when I plug my phone into a charger that BT is turned on. It turns off when unplugged. Sure, it will turn on when you plug it into any charger but there is no way (that I know of) to distinguish if you are in your car or elswhere. 5) Reboot. On 2 occasions I noticed that my battery would just drain quickly despite my best efforts. In both cases just rebooting the phone fixed this. 6) Rogue apps. I have not had this problem on my Bionic, but did on my old droid. One day the battery just decided to drain in a few short hours. This occurred every day and so I installed System Monitor. I left it running and after about a day I found that a rogue app was eating CPU cycles and killing my batter. I just uninstalled it and my battery life was then fine. So after much frustration I am happy with my Bionic's battery life. The above may not be an ideal situation, but for me it's a good trade-off for usability and battery life. I hope this helps. Cheers!