Battery upgrade/replacement for the Kurzweil K1000, K1000SE, and K1200. Replace batteries easily. Solder the red wire to the hole where the positive pin of the original battery was and the black to the negative. Instead of unsoldering/resoldering a new battery cell each time the batteries need to be replaced, you can simply pop out the old commonly available CR123A battery and pop in a new one. Each holder comes with a small piece of high-quality velcro on the bottom.
Due to shipping regulations no CR123A battery cell is included. They are readily in any large store or Amazon for a few dollars.