Just over 10 days before the iPhone is due to go on sale in the US, Apple has announced improved battery life figures for the product and has revealed that the screen's surface has been upgraded.

The handset, which will be available to consumers at 6pm on June 29th, will boast up to 8 hours of talk time, 6 hours of internet browsing, 7 hours of video playback or 24 hours of music playback and up to 250 hours of standby time.

This is a marked improvement of what had previously been expected from the iPhone's battery which was a more modest 5 hours of talk time and up to 16 hours of audio playback.

In a statement, Apple's CEO Steve Jobs boasted that the new battery life announcements meant that the "iPhone's battery life is longer than any other 'Smartphone' and even longer than most MP3 players".

Also for a quick pre-sale revamp is the 3.5-inch touchscreen surface, going from plastic to glass.

Steve Jobs stated: "We've also upgraded iPhone's entire top surface from plastic to optical-quality glass for superior scratch resistance and clarity".

Consumer demand for the iPhone is going to enormous, with many reports predicting over-night queueing and a police presence when the product goes on sale. This "bonus" information is only going to increase desire for the product, something that Steve Jobs seems more than happy to encourage:

"There has never been a phone like iPhone, and we can't wait to get this truly magical product into the hands of customers starting just 11 days from today."