These cord lock lights from
Black Crater have been available since around September of this year. REI carries them as well a photonlight.com where I bought mine. A little larger than I imagined, but still of a useable size. The LED runs off of two CR1220 lithium batteries and has run times listed on package of: High 12 hrs, Low 20 hrs , and Flash 50 hrs, though I've not tested those. The light cycles thru a push button on the side. It puts out typical small keychain LED amount of light with just a slight difference between low and high. The batteries are accessible thru the black rubber boot held in place by a lip and friction. Easy enough to remove with a fingernail, but I think it'll stay in place with normal use, and the package mentions 'Water Resistant Construction', probably meaning it'll be ok in the rain. A loop of paracord easily fits thru the cord lock section. I'll probably put one on a paracord keychain and the other on a jacket. Sorry for the poor video quality from my no frills camera and goofy editing.