Existing users, 
Shorter battery life after iPhone update 1.1.1: Fixes
Posted 15 October 2007 @ 10am in Troubleshooting
A surprisingly high number of users are reporting significantly shorter battery life after applying the iPhone firmware/software 1.1.1 update. Some typical reports:
- “Yes, my battery life is terrible after 1.1.1. [...] My phone is off the charger at 8:30 AM and is normally giving me the 20% battery warning at about 6-8 PM in the evenings and it’s quickly down to 10%. I make sure that I have WIFI off and even the brightness fairly low.” — Ryan Schmidt
- “I’m seeing issues with my battery life at updating to 1.1.1. On some days I might get 3 hours of idle time before my battery is run down and I have to plug it in. Some days I might get through 6 hours before getting the low battery warning. Before the update I could unplug at 6am go to work and not have to plug it in again till 9pm.” — MIke Welland
In addition to the dozens of reports we’ve received, Apple’s Discussion boards are littered with similar complaints.
There are a few effective fixes that have emerged for this issue:
Forget Wi-Fi networks As previously reported, some instances of this problem appear to be caused by repeated, failed attempts to automatically join certain wireless networks. The temporary solution is as follows:
- Navigate to Settings, then select Wi-Fi
- Tap the arrow next to each listed Wi-Fi network and tap Forget this Network
- Go back to the Wi-Fi screen and manually join the desired network
Failing that, turn Wi-Fi off, then back on using the Wi-Fi settings screen and re-apply the aforementioned steps, or turn Wi-Fi off altogether.
Delete and re-install iPhone 1.1.1 update This fix is a bit more involved, but has proved effective for a number of users and may be more permanent. It involves deleting the iPhone 1.1.1 update file from your computer, then restoring your iPhone, forcing it download and install a fresh copy from Apple’s servers.
Follow these steps:
On a Mac Look in the directory ~/Library/iTunes/iPhone Software Updates and move the file iPhone1,1_1.1.1_3A109a_Restore.ipsw to the Desktop or another location. Next, connect your iPhone to your Mac, and select the “Restore” option from within iTunes.
On a Windows PC Look in the directory C:\Users\Your name\Application Data\Apple Computer\iTunes\iPhone Software Updates\ or C:\Documents and Settings\username\application data\apple computer\itunes\iphone software updates\ and move the file iPhone1,1_1.1.1_3A109a_Restore.ipsw to another location. Next, connect your iPhone to your computer, and select the “Restore” option from within iTunes.
Feedback? info@iphoneatlas.com.
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2 Comments
Posted by primal1
16 October 2007 @ 10am
When I’m logged into my office network, I pick up other nearby networks, and my iPhone constantly cycles “Choose a Network…” When I try the above fix, there is no selection for any of the unwanted networks to “Forget this Network,” that option is only available on my own network and none of the others. I tap on the arrows next to the unwanted networks and only get network configuration options with no “Forget this Network” button. Any ideas on how to “forget” these unwanted networks when there is no “Forget this Network” button? Thanks in advance for any workaround suggestions.
Posted by vaughnsc
16 October 2007 @ 1pm
Uh, just playing fact-cop,: the filenames you are referencing here are for the 1.0.2 firmware; shouldn’t one be forcing a fresh download of the 1.1.1 update? Namely: ‘iPhone1,1_1.1.1_3A109a_Restore.ipsw[.zip]‘