Apple today announced that iPhone will deliver significantly longer battery life when it ships on June 29 than was originally estimated when iPhone was unveiled in January. iPhone will feature up to 8 hours of talk time, 6 hours of Internet use, 7 hours of video playback or 24 hours of audio playback. In addition, iPhone will feature up to 250 hours-more than 10 days-of standby time. Apple also announced that the entire top surface of iPhone, including its 3.5-inch display, has been upgraded from plastic to optical-quality glass to achieve a superior level of scratch resistance and optical clarity.