iPhone battery life after jailbreak

1. Download "services" and shut down SSH when you aren't using it.

2. With all the different applications running, simply hitting the home button when you're done with them keeps them running and therefore wastes battery power. When you are done with an application, hold the home button down until it disappears and this actually closes the application.

http://forums.ilounge.com/showthread.php?t=210043