Time to attach those iphones to itunes again for another update Apple releases iPhone OS 3.1.3 with battery reporting fix Apple on Tuesday afternoon released version 3.1.3 of its iPhone OS software for the iPhone and iPod touch, bringing with it improved accuracy of reported battery level on the iPhone 3GS. The update also reportedly resolves an issue where third-party applications would not launch in some instances. It also addresses a bug that could cause applications to crash when using the Japanese Kana keyboard. iPhone OS 3.1.3 also includes a number of security updates related to CoreAudio, ImageIO, Recovery Mode and WebKit. Full details are available in the support document on Apple's Web site. The update for the iPhone and iPod touch operating system is available for download through iTunes.