Jeez, one of my favorite finds! This is an emergency 1.5VDC wet-cell battery. When you need it, you remove the cork, break off the little glass tube and fill it with clear water… Let stand for 10-12 hrs and presto, you got juice. I’m told, if you’re stuck in the middle of the desert without any possibility of water, you can pee in it, and that’ll make it work too. You gotta love it! Brand-new. 4.75” x 2” x 2”