C & D Battery Spacers: 8 pcs total (4 x C, 4 x D).
18Pcs AA to C Size Battery Adapter Converter Spacer Battery Adapter Case | eBay
Best Buy: Panasonic eneloop AA to C Rechargeable Battery Spacers (2-pack) K-KJS2MCA2BA
Popular Mechanics Battery Converter AA to C and D Size Battery Spacer Converter Case Turns AA Batteries into C and D Pm-P913N612 - The Home Depot
Worker Battery Spacers (AA to C) – Out of Darts
Eneloop AA to C Cell Converters
C/D size adaptor Converter Alkaline Battery Rechargeable adaptor for C/D AA Size Ni MH/NI CD Spacers EBL black Converter|Rechargeable Batteries| - AliExpress
Panasonic Eneloop D Cell Spacer AA Battery Converters - 4 Pack
Amazon.com: Miraclekoo C Size Battery Spacers for Sanyo Eneloop or Other AA Batteries, AA to C Size Battery Adapter C Battery Converter,6 Pack : Health & Household
24pcs(Each 8 of Hitech AA 2.5Ah Rechargeable & C & D battery spacer)Up to 30%OFF | eBay
21905: C-Cell Battery Spacer
Eneloop Combo Kit 4x AA 4x C Cell Spacer, Free Charger
eneloop “C” Size Spacers 4-Pack – Panasonic
Amazon.com: EBL C Size Battery Adapters, AA to C Size Battery Spacer Converter Case Use with Rechargeable AA Battery Cells - 4 Pack : Health & Household