Recently came across a 'kids' book that was about power and motors or something like that. With the book were some supplies that included a 'battery holder'. I took notice that the holder was nothing more than a film canister. It seems that an ordinary film canister very neatly holds a "C" size battery. While that may not seem like 'much'...I did notice that it holds the battery in such a way that you could put wire in at the bottom and place the battery in on top and then place another wire on top and when the top is squeezed on, it makes some nice electrical contact (you may need to put in a folded piece of paper to get a really good contact). I've had some trouble in the past of trying to make some improvised electrical connections on the ends of the battery with tape (who hasn't)...but it never worked well. This seems to solve that. It opens the door of how to connect relatively securely to a battery with a minimum of difficulty. Seems it would work well for a kids science project too.....save some money.