A while ago, a friend of mine was going on an expedition to Peru and didn’t want to run the risk of his iPod loosing power. His cunning solution was to take the solar panels out of all the calculators he could find in order to build a solar charger to attach to the top of his rucksack. For a while, this wasn’t an issue until the battery in the calculator ran out and had no way of recharging. Something had to be done, and it wasn’t going to be pretty.
When the battery was replaced, it was clear the back would never fit on again, but calculator casing is over-rated anyway. As is the orientation and presence of all its buttons.
