Use 24v Batteries to run 12v System... Possible?

I use an instant variety of hot chocolate, no gadgets required. Keeping it simple. Few teaspoons of powder with whatever beverage you prefer. It's just one of ingredients.

Of course, a few teaspoons of hot chocolate in a glass of schnapps would be, er... not the same as a cup of hot chocolate with a little schnapps. Need to try this some day :)