Canadian iPhone User - iPhoneUser.ca

My battery life on 1.1.4 seems to be getting better and better after every charge. Here are the current stats:

iPhone #1 :
Usage - 4 hours, 35 minutes
Standby - 3 days, 14 hours
about 10% left

iPhone #2 :
Usage - 3 hours, 38 minutes
Standby - 3 days, 11 hours
about 20%

When I was at 1.1.2 I was thinking the battery life wasn't so good. Now I'm thinking that this battery life is better than any other cell phone I have ever owned. Especially with the things that it can do. With other cell phones I have owned in the past, it seems to me that the battery starting dying faster after about 1.5 to 2 years. I wonder how long my iPhone battery will last. I definitley don't want to open up the phone or send it in to Apple. Probably what will happen is that there will be a 3G iPhone out by then and I won't have to worry about the batteries on these current iPhones.