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The depressing thing about battery technology is that it gets better, but it gets better slowly. There are a whole bunch of problems in materials science and chemistry that come in trying to make existing batteries better.

My mobile phone battery runs out all the time because all the messages come straight to me.

The technology is just so far gone. It's just like back in the day you needed a suitcase just to have a cell phone. The battery was so heavy, it was like carrying a gallon of soda around with you all day.

What we want to do is make a leapfrog product that is way smarter than any mobile device has ever been, and super-easy to use. This is what iPhone is. OK? So, we're going to reinvent the phone.

It's a juicy thing to say we're building a phone, which is why people want to write about it. But it's so clearly the wrong strategy for us.

When we started work on the iPhone, the motivation there was we all pretty much couldn't stand our phones, and we wanted a better phone.

Apple has long been a leading innovator of mobile technology; I myself own an iPhone.

I am impressed with the innovation in the wireless marketplace. The Blackberry, the iPhone, the Pre, and other smart devices are breakthrough technologies that have helped revolutionize the wireless space.

Mobile devices such as Android and the iPhone achieve their battery life largely because they can aggressively and quickly enter into and exit from sleep states. GPS prevents this.

A battery by definition is a collection of cells. So the cell is a little can of chemicals. And the challenge is taking a very high-energy cell, and a large number of them, and combining them safely into a large battery.