Battery Life of iPhone 4S Draining Too Fast? Try Calibrating the Battery
Some users are indicating the iPhone 4S battery isn’t lasting as long as expected, this comes alongside separate reports of iOS 5 battery life draining quicker than usual. While some of the 4S battery life complaints could be attributed to the aforementioned iOS 5 issues (most of which are easy to fix by adjusting settings), there could be an even simpler explanation, the battery needs to be calibrated.
In a post comparing the iPhone 4S and iPhone 4 battery life, MacRumors reports that calibrating the battery can make a substantial difference in battery life, as “some [iPhone 4S users] have found their battery gauge to be inaccurate until this is performed.”
That recommendation is in line with Apple’s official battery life tips, and they specifically suggest charging the battery to 100% and then completely running it down at least once a month:
For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down).
Apple also recommends turning off features within iOS that you don’t use, which we can confirm makes a substantial difference for all iOS devices, not just the 4S.
Of course there could also be some technical reasons that the 4S battery may not last quite as long. The iPhone 4S tech specs show a significantly faster processor and GPU unit, in addition to an improved battery. The added power of the CPU could be impacting battery life, but in real world tests performed by iLounge, the difference is not particularly significant. Specifically, they measured the iPhone 4 and 4S, and found that in many cases the iPhone 4 has slightly better battery life, although they caution that ultimately how long your battery lasts largely depends on how you use it.
Another aspect that could be impacting iPhone 4S battery is the lack of a manual 3G connectivity switch. This only affects some users, but for those in regions with a poor 3G reception, the cycling between 3G and Edge networks can diminish battery performance as the devices baseband attempts to connect to an optimal signal. Typically one can remedy this by disabling 3G within their iOS network settings, but this option is unavailable to 4S users in the current version of iOS 5.0.
Did calibrating the iPhone 4S battery resolve your issues?