So, I brought this map case (right). Like most of my impulse buys from the legendary 'Show me man things!' section of TKmax, it was used once (for a camping trip) and then neglected. This was until I decided I needed a case for another unjustified man-toy - the Goal0 7 watt portable solar panel charger.
This little beauty (left) is reported to be able to charge an average smartphone on the move. Now it doesn't really touch smartphone-scale power outside of blistering solar fernace of Mercury, but it will run a portable FM/AM radio during the Aberdeen noon hours, which makes it OK in my book.
More to come.