Batteries4pro - Sizes and Formats of cells and batteries
AAAA, AAA, AA, C, D and F Battery Cell comparison - YouTube
Sleeves and spacers turn AA or AAA batteries into C- or D-cell
AA battery - Wikipedia
Lot D Cell Size Rechargeable Batteries NI-MH 1.2V / AA AAA C D Battery Charger | eBay
Amazon.com: Tenergy High Drain AA AAA C and D Battery, 1.2V Rechargeable NiMH Batteries Combo, 8-Pack 2500mAh AA Cells, 8-Pack 1000mAh AAA Cells, 4-Pack 5000mAh C Cells and 4-Pack 10000mAh D Cell
When is the last time you saw a C battery? - menga.net
H-E-B Alkaline D Batteries - Shop Batteries at H-E-B