Macworld: The Truth About iPhone Battery Lifespan

Macworld’s Jason Snell talks to Apple marketing vice president Greg Joswiak about the iPhone’s expected battery life:

“After 400 complete cycles, the iPhone’s battery still has 80 percent of its charged capacity,” Joswiak said. “And by a complete charge cycle, I mean completely draining the battery, a full chemical cycle.” In other words, using a little battery and then putting your iPhone back in its dock doesn’t count as a charge cycle. If you use a quarter of your iPhone’s battery and then re-charge it, Joswiak said, that’s the equivalent of a quarter of a charge cycle.

“If you top it off, you’re not wasting a charge cycle,” Joswiak said.

★ Thursday, 12 July 2007