OK Its at night. You got a flat on a dirt road, and your cell has no signals. So you need to change your tire. GOOD NEWS:
You got a jack, a spare WITH AIR!, A flashlight.BAD NEWS:
Flashlight D-Cell batteries are DEAD!
OK you have your Boom-Box, with good batteries, But it has C-Cells.
OK here is what you have:
2. DEAD D-cell batteries
3. good C-cell batteries
4. Sheet of foil.
Here how to make it work: