While your in prison, why not get a tattoo to commemorate " the time of your life", and there's also no better way of showing your commitment to what ever gang you choose to join while in the clink. The basic design uses any form of battery to power a small motor, which in turn pushes a needle in and out of a pen to give inmates authentic jailhouse tats. Sadly choice of colors is usually limited to whatever Bic's they have on hand and are typically blue or black. Beggars (Neo-Nazi's included) can't be choosers though.
With cigarettes being the go-to currency of choice for prisoners (at least the movies would have you believe this), there wouldn't be much use for a smokable commodity if there was no way to light it. Prisoners are forbidden from having lighters and matches for obvious reasons, so some clever inmates have devised a way around the rules. This example of a lighter is a simple yet intelligent design, a AA battery is wrapped in duct tape with a wire strapped to the negative end. Simplly touch the other side of the wire to the positive end and the metal coil in the center of the wire heats up.
Look for more posts in the future, and as always, "Happy Hunting!"