by Bradley Slattery
The fun thing with button batteries is that there are so many types that once you buy spares for everyone you need - you'll end up with a box full of batteries. I think i got around 50 button batteries of various sizes - most for various kids toys.
My batteries (I pledged for 5 of your fine rulers) are already ordered. Now all I have to do is wait for the postman...
Thanks for the heads up on the battery. I totally forgot!