For awhile now I’ve been thinking about how nice it would be to have a something like a modern version of the Poqet PC.

The Poqet PC had a much nicer keyboard than the laptop in the article, and between the simplicity of its software and a very aggressive power management strategy (it actually paused the CPU between keystrokes) it could last for weeks to months on two AA batteries.

Imagine a modern device with the same design sensibilities. Instead of an LCD screen you could use e-ink. For both power efficiency, and because the e-ink wouldn’t be well suited to full motion video the user interface could text/keyboard based (though you could still have it display still images). Instead of the 8088 CPU you could use something like an ARM Cortex M0+, which would give you roughly the same amount of power as a 486 for less than 1/100th the wattage of the 8088. Instead of the AAs you could use sodium ion or lithium titanate cells for their wide temperature range and high cycle life (and although these chemistries have a lower energy density than lithium ion, they’d probably still give you more capacity than the AAs, especially if you used prismatic cells). With such a miniscule power consumption you could keep such a device charged with a solar panel built into the case.