Ben heck has a new prototype NES portable – “This uses a different kind of NES on a chip motherboard and is actually even smaller than my original nPod. It has an easy-to-use sliding battery pack (4 AA’s that last a long time) and clean, simple styling. And lo and behold it has a headphone jack! Customization would also be possible, such as all the gray parts could be a different color, for instance.” – Link.