Use C-Cell Batts for D-Cells using Coins

Here’s a cool, quick hack. I just went to buy some D-cell batteries and found two displays in the store with every battery type BUT D. They seem to be getting rarer. I already had a bunch of Cs on hand. Using four (or five, or six) quarters, you can make up the difference in the battery holder and adapt C-batteries where Ds are called for.

[Via Lifehacker]