Just like antenna troubles reported in iPhone 4, it is battery issue in its successor iPhone 4S. According to several reports, a software bug is reportedly causing the rapid battery drain in the new iPhone. Web reports suggest that the problem may be due to the Setting Time Zone function, which keeps location tracking on at all times.
Many users have found that the “Setting Time Zone” feature in Systems Services seems to be ‘on’ even when a continues to remain at the same location and time zone. The icon besides the setting, which indicates if it has been used in the past 24 hours, shows that it is running repeatedly to access the phone’s location.
According to idownloadblog,”… it appears that iOS 5’s GM release introduced a bug that causes the Setting Time Zone function to keep the location tracking circuitry running constantly, draining battery power considerably. Switching it off may mean that your iPhone will no longer set its own time zone when you travel, but that’s a small price to pay for having your iPhone last more than 12 hours on a full charge. Leave the rest of the location settings on.”
The blog claims that it has tested this method on four different iPhone 4S handsets, including an iPhone 4 and an iPhone 3GS. All have reported drastically improved battery life after switching “Setting Time Zone” off.
Since iPhone 4S launch on Oct 14, several users have complained of poor battery life, with few claiming that their device ’s battery lasts only for a few hours despite minimal use.
Though Apple hasn’t officially acknowledged the issue, reports suggest that the company has asked a few iPhone 4S users to install a monitoring programme to diagnose the users’ complaints.
Incidentally, while announcing the iPhone 4S, Apple CEO Tim Cook claimed that iPhone 4S will offer a much better battery life with as much as 8 hours of 3G talk time, 6 hours of browsing (9 on WiFi), 10 hours of video playback, 40 hours of music and standby time for 200 hours.