Anyone having major battery performance issues since upgrading to the new OS? I am getting ... Apple iPhone forum
iPhone 3GS with new OS 4.0.0 Battery issues
Anyone having major battery performance issues since upgrading to the new OS? I am getting about half of my pre 4.0 battery life. It would be great if someone also knows the fix!
Well, iOS4 is more RAM intensive than the previous firmwares, which could result in battery loss. There isn't much you could to do other than take extra steps to try to help battery:
-Turn off Wifi when not used
-Minimize amount of apps multitasking
-Turn down Brightness
-Use it less
You should generally get up to 8 hours of hard use. Also, people have reported that if your iPhones battery is running out quickly, and is warming up as well, to give it a reboot. Not sure if that will help, but its worth a try.
My personal suggestion, restart the phone, and let it get a full charge, then see how it works.