The new iPad guts are nice, at last getting 1GB of much needed RAM to accelerate all that web browsing. But the most impressive thing is the new battery, which takes most of the space. It's a gigantic 70 per cent larger!

The iPad 2 had a 25-watt-hour Li-ion battery. The iPad 3 has a 42.5 watt-hour battery! That's 70 per cent more than the previous capacity. 70 per cent more magical battery unicorns, people.

The battery life hasn't changed, however: it's still ten hours of use, nine with average use of the mobile data network. So why the increase? Obviously, that big screen and the more powerful processor are hitting the power big time.