iPhone Battery Lifespan
Inaccurate information about the lifespan of the iPhone battery has made its way to the media. According to Kent German and Donald Bell, in their article review, Apple iPhone leaves users wanting more, "...the iPhone does not have a battery that a user can replace. That means you have to send the iPhone to Apple to replace the battery after it's spent (Apple is estimating one battery will last for 400 charges -- probably about two years' worth of use)." German and Bell's report also claims that "Apple is estimating one battery will last for 400 charges -- probably about two years of use."
In response to this, Apple marketing vice president Greg Joswiak stated that, "Most iPhone users will realize, as most iPod customers realized, that they never needed to replace their batteries." Joswiak goes onto explain that, “After 400 complete cycles, the iPhone’s battery still has up to 80 percent of its charged capacity,” Joswiak said. “And by a complete charge cycle, I mean completely draining the battery, a full chemical cycle.” If you are like me, and don't always wait until your iPhone battery is completely drained before recharging it, then the charge would not be considered a complete charge cycle, according to Joswiak's logic. If you recharge it half way, then that is considered half of a charge.
If you do need to replace your battery, apple offers the battery-replacement program. If your battery is still covered under the one year warranty, then it will be replaced for free. Apple offers resources for teaching you how to extend the lifespan of your iPhone battery on the iPhone battery page. The benefit of doing this is that you are less likely to have to replace your battery before your next iPhone upgrade. For step-by-step illustration on monitoring your iPhone battery usage, and other tips, check out the youtube video here.
To read more about Apple's recycling efforts, visit the Apple Recycling Program.
Apple faces mounting complaints on iPhone battery
First Look: Up close with the iPhone