10 AAA to AA Battery Adapter Converter. Small size, easy to carry. Both convenient and functional.
eBay
10/5PCS Mini Plastic AAA to AA Size Cell Battery Converter Adaptor Holder Case Switcher Cell Battery Holder Converter
Aliexpress UK
Size:Approx.50 14MM(H Inner D Outer D).
eBay
4P/8/16PC AAA battery 1.6V Ni-Zn AAA Rechargeable Batteries nizn AAA battery 900mWh and battery Charger for AA/AAA NIZN battery
Aliexpress UK
Size:Approx.50 14MM(H Inner D Outer D).
eBay
4pcs AAA To AA Size Battery Converter Adapter Batteries Holder Durable Case Switcher Battery Converter Коробка Для Хранения
Aliexpress UK
Features:Made of plastic material, and metal on the bottom, small, easy to carry.Battery Holder Converter: Convert size AA battery to D size battery.Easy to use, just stick the AA battery in the converter and it's the same as a D Size battery.They are also used as protector cases for your AA batteries, keep dry to store your batteries.Specifications:Color: ClearSize: 32mm x 59mm / 1.26 inch x 2.32 inch(D*L)Material: Plastic, MetalType: AA size battery to D size batteryPackage Content:4 Pcs x Battery Adapter.
eBay
4pcs AAA to AA Size Battery Converter Adapter Batteries Holder Durable Case Switcher Battery Converter коробка для хранения
Aliexpress UK
Description: Features: 100% brand new and high quality. Made of environmental material, practical and durable. Small size, easy to carry. Fine workmanship, standby specification Choose from 4 Types of Adaptors 1 x AA battery can replace D battery to use. 2 x AA battery can replace D battery to use. 1 x AA battery can replace C battery to use. 1 x AAA battery can replace AA battery to use.
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AAA/7 conversion AA/5/14500 battery cartridge Battery converter sleeve 18650 conversion 21700/26650 battery converter cartridge
Aliexpress UK
Quantity: 1 set(4pcs). Battery holder converter: Switch size AAA battery to AA battery. 4 pcs x AAA To AA Battery Converter(other accessories demo in the picture is not included.). These battery converter is convenient, reduce weight and save money for you.
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Original AA Rechargeable AAA Battery 1.5V AA 9800mAh/AAA 8800mAh alkaline battery for Clock Radio Video Game toys AA AAA Charger
Aliexpress UK
This AAA to AAA adapter case converts a AAA battery to a standard AA battery size. The weight of an AA/AAA alkaline battery is normally about 23/7.5 grams, while our adapter weighs 3.5 grams. Together they weigh 11 grams, which results in a weight reduction of 12 grams.
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1 Piece Hard Plastic AA AAA Case Cover Holder AA / AAA Battery Storage Box Container for 4 6 8x AA AAA Batteries
Aliexpress UK
Kitchen Filter Rice Washing Drain Basket Multi Function Washer Bowl. -The AAA to AA battery converter is a versatile accessory that allows you to use AA batteries in devices that require AAA batteries.
eBay
PALO 1.5V AA AAA Rechargeable Li-Ion Battery AAA AA Lithium ion Batteies With LCD USB USB Charger for 1.5V AA AAA Battery
Aliexpress UK