Sleeves and spacers turn AA or AAA batteries into C- or D-cell

Sleeves and spacers reliably allow you to use AA or AAA batteries with C or D gadgets.

2x AA to C Size Battery Converter Adaptor Adapter Case

The 15 Best Battery Holders to 3D Print of 2023

EBL C and D Size Battery Adapters, AA to C and D Size Battery Spacer Converter Case Use with Rechargeable AA Battery Cells - Batteries Are Not

EBL AA to C and D Size Battery Spacer Converter Case

Double nipple, M12 x 1.5 tapered x 1/4 cylindrical, brass - OEG Webshop

AA to D AAA to AA Battery Conversion Adapter Holder Plastic Batteries Case Box

Duracell Ultra Alkaline Batteries AA (Pack of 8) - , Indian Online Store, RC Hobby

Jasco NC-AA-1000-3-D-CA84RP NiCad Battery Pack 1000-Milli Amp-Hour 3.6 Volt

Genuine Lithium Batteries for DIY Projects – Battery Hookup

Homemade Emergency Battery Adaptors/spacers - or What to Do With a Battery That Won't Fit? : 6 Steps - Instructables

Parallel Battery Spacers 3 AA To D Cell

Powerlion C Size Battery Adapters, AA to C Size Battery Spacer Converter Case Use with AA

Bought a used toy for my kids at a garage sale. I guess they didn't have any C batteries. But they did have an AA battery and a wood dowel though.

Battery Eliminator - AAA Battery Dummy Cell - fake battery circuit