Duracell Duracell Coppertop D Cell Batteries, 4-count Pack, Long-lasting Power, All-Purpose Alkaline Battery for your Devices 004133303361 - The Home Depot
4 Pcs Parallel Convertor Adapter Battery Holder Case Box 3 AA/LR6 to 1 D Size | eBay
Using a D-Size Battery String for a UPS Energy Source | Math Encounters Blog
D battery - Wikipedia
D battery - Wikipedia
Battery (Size D, Alkaline) - LionsDeal
Ultralife U10025 3 Volt 4.8Ah "C" Cell LiMnO2 Lithium Battery
A Guide to D Batteries and Rechargeable D Batteries