"A little high in price, but it's a rechargeable microlight! Costs about 6 cents per charge when using a D-Cell battery to charge it. Charges from any common household battery! Has Freedom Technology, SOS, and STROBE!"
"Great little light that runs on 1 AAA, and puts out 0.5 watts. Maybe not for you keychain, but clips unobtrusively to your pant or shirt pocket. Awesome light output and decent throw for its size. Battery, clip, and lanyard included."