Hi All.

I have two sets of iphone. One set I believe, I have damage the battery. It usually does not last more than 1 day. The other set can last 2-3 days. The usage pattern is the same. I think I have damage the battery during initial charging as I did not do a proper 8hrs charging. From then on, even on full charge, you will notice that the green battery indicator does not fill the whole battery icon. I tried to discharge the battery and recharge it full but did not solve the problem. Conclusion, battery damage and need to change or live with it.

How to conserve your battery.
1. Turn off wifi when not in use.
2. Uninstall or turn off ssh
3. Do not use any apps that tend to access the network to check status, e.g. IM, chat, etc
4. Charge your battery using the power adapter not power from USB port. As different notebook, the power from USB is not consistent.
5. Don't turn on the lcd unnecessarily. Esp if in pocket.
6. If u use *SIM adapter, some may drain more battery. If so, change to another.

If you want to change battery, see if any expert bros here can help.

my brand new iphone on firmware 1.1.3. Heavy user, last me about 1-2 days.