eneloop Panasonic BQ-BS1E4SA D Size Battery Adapters for Use with Ni-MH Rechargeable AA Battery Cells, 4 Pack - Walmart.com
C Alkaline Batteries, 6 Pack
C&D Technologies | LinkedIn
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
Guide to the Best Rechargeable C & D Batteries + Chargers
12 Best Rechargeable AA and AAA Batteries of 2023 | Reviews by Wirecutter
Sleeves and spacers turn AA or AAA batteries into C- or D-cell