Might sound like a stupid question, but here goes ... if you are down a mine, would this solar panel work with candle or torchlight?
It would work, which is to say a tiny amount of electricity would be produced, but not enough to be of any practical use.
You can be sure that as soon as photoelectric cells become really efficient (hasn't happened yet, but we're getting there), they'll all be using them when the sun comes out.
Which reminds me: wot sun? Your best bet is just carry a spare battery, and remember to unplug your Stenlight when it goes back in the pack, to avoid flattening the battery and shortening it's life.
Cheers,
JohnnyM
Pain is temporary. Glory is forever. And chicks dig scars...