The other day we talked to you about iOS 5 Battery Fix, a patch that should improve battery life on the iPhone 4S terminal with iOS 5/5.0.1 installed. Although its developer and some of those who tested it claim that the autonomy has been improved, a member of the Chronic Dev Team stands up that the tweak does not improve the autonomy of the terminals at all. The above picture was published on the blog of the developer of the SAM patch, with which you can hack an iDevice, and it should prove that the lines of code in the iOS 5 Battery Fix do not influence the battery autonomy in any way.
There has been a lot of hype recently about a 4S 'Battery Fix' – DHowett found that all it does is replace /System/Library/CoreServices/powerd.bundle/com.apple.SystemPowerProfileDefaults.plist. I looked for any possible impact of this. While this sounds good… we're changing the power settings right? The reality is that it does absolutely nothing. I wrote a small program to look at the active power settings (which is what the phone uses of the plist that is modified) and this is the result.
As you can see, there are actually only 4 settings that are used, and it should be noted that none of these settings were changed after installing the package and rebooting. The original and modified copies of the list are below.
Practically, DHowett, a member of the Chronic Dev Team, claims that the iOS 5 Battery Fix does not improve battery life at all, and the developer SAM claims that the patch replaces an iOS 5 file, but nothing more. I installed the patch in question yesterday, for now I can't draw any conclusions about its impact, so it remains to be seen what details will appear in the following days.
