With their impressive history with mobile devices, Neonode has developed energy-efficient technology that is ideal for the XO.

ENGADGET: One Laptop Per Child's XO-4 Touch 'expected' to be released in Q1 2013

The series initially includes the Cortex-A53 and Cortex-A57 processors and introduces a new, energy-efficient 64-bit processing technology, as well as extending existing 32-bit processing.

ENGADGET: ARM's Cortex-A50 chips promise 3x performance of current superphones by 2014, throw in 64-bit for good measure

The smart pen is powered by one AAA battery, and with the help of the energy-efficient Bluetooth 4.0 technology, will last for months of continuous drawing.

ENGADGET: Ten One ships $80 Pogo Connect, a pressure-sensitive Bluetooth 4.0 stylus for iPad