Technology Blog

Apple have updated the entry level MacBook-
2.4GHz Intel Core 2 Duo
2GB DDR3 memory
250GB hard drive
8x double-layer SuperDrive
NVIDIA GeForce 320M graphics
Built-in 10-hour battery (WOW)
Polycarbonate unibody enclosure

More here-

http://www.apple.com/nz/macbook/

Here are some articles explaining the new battery design on the MacBook Pro’s, it is being reported that the new integrated battery design will deliver longer battery life. The new batteries are based on a custom lithium polymer battery that utilise more space than conventional ones, read more here-

http://anandtech.com/mac/showdoc.aspx?i=3580&p=1

http://www.apple.com/macbookpro/features.html