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.

Pieces 3 x AA to 1 D Size Parallel Battery Holder Conversion Adapter Switch Converter Case

8 Slot LED Battery Charger Suitable for AA/AAA C / D Rechargeable Batteries Charging Adapter Short Circuit Protection - AliExpress

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

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

D cell, C cell, AA cell, Dummy battery spacer, Adapter, converter.

D Battery Eliminators

Quickly and easily convert eneloop AA batteries for use in D size battery applications Made from high quality, durable plastic Saves hundreds of D

eneloop SEC-DSPACER4PK D Size Spacers for use with AA battery cells

Uxcell AAA to AA Battery Adapter, AA to C Size Battery Adapter, Metal Contacts Clear 3 Set

Battery Adapter Case Type C Battery Adapter Type AA to C Battery Spacer Adapter with AA Rechargeable Battery-Pack of 5

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

Aa Battery Conversion Sleeve Aa D Battery Conversion - Temu

Genuine Lithium Batteries for DIY Projects – Battery Hookup