For a handy keychain flashlight that's great in a pinch, pick up the TEC Accessories Pixel. This flashlight has one of the best size to lumens ratios out there - less than 2 inches long and up to 25 lumens. And with its stainless steel construction and water-resistance, its a tough little addition to your keyring. Put it on your keychain. Attach it to your bug-out bag. Keep one in your glove box. It'll come in handy.