[DaPeeps]

For me the biggest change was turning off push email and any auto - email checking. That extended my battery life considerably..making it last almost 4-5 hours longer than normal. I've also heard that changing the settings in phone > menu > options > services > time synchronization can help as well...apparently is makes it so your phone automatically checks the network to sync the time. I doubt it saves much battery...but every little bit counts.

For me...an extra battery is currently unneccesary because I am ALWAYS near a charger...I have them littered around my house, at work...whereever. However, I plan on using my phone much more since I have recently become a facebook/twitter ***** (lol) and I also plan on using it to geocache. I have become big on twittering pictures with my GPS loc. tagged so that people can see what I am doing whenever I want them to...I love it! So...an extra battery seems inevitable.