Usually they set them up to be idiot-proof. They lock down a specific time and place, sometimes even the duration they can stay there, so all you have to do is open them.

[ He continues browsing the shelves and finally settles on what he's looking for. When he returns, he has a rock and a piece of steel in hand. ]

It's possible to change that. I modified the date on that one, but in the real world they were tracked so... [ he stops himself there, backtracks ] ...it wasn't designed to be user friendly in that regard. They're typically reliable, but obviously I was too trusting when I took that one.

[ Taking the lamp, he gets to work on his fire project. Lucky for them, he's had a lifetime of experience without electricity to work with. ]