Just received this from Amazon: Amazon.com: STREAMLED: 1000LM Lumen UltraFire C8 CREE XM-L T6 LED Flashlight Torch 18650 Battery Charger: Home Improvement
It includes a nice case, flashlight, 2 18650 batteries, and battery charger for $26.99 shipped free.
Good to have in the car, and it uses the 18650 cells so good for show&tell as well.
You inspired me to get one of these sets for myself! It arrived this morning by UPS and an hour later I had occasion to spend a little Tesla time; I showed them the 18650 battery and gave the spiel. Awesome visual aid. Nice flashlight, too: how can one LED be so bright?