Size:Approx.50 14MM(H Inner D Outer D).
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PALO 1.2V AAA Ni-MH Rechargeable Battery AAA Batteries 1100mAh AAA 3A Battery +8 Slots LCD USB AA AAA NIMH Battery Charger
Aliexpress UK
10pcs AAA to AA Converter AAA to AA Battery Adapter AAA to AA Battery Converter Holder AAA to AA Adapter for AAA to AA Battery. Easy to Install:Nothing Complicated, Just Stick the AAA Battery and AA Battery in the Converter.
eBay
4pcs AA To D Battery Box High Quality 3x AA To D Size Battery Adapter Converter Holder Switcher Case Box For Battery Storage
Aliexpress UK
This AAA to AAA adapter case converts AAA battery to standard AA battery size. The AA/AAA alkaline battery weight are normally about 23/7.5 gram while our adapter weighs 3.5 grams. The inner of the adapter fits one AAA battery.
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Original rechargeable battery 1.5V AA9800MAH+AAA8800MAH aa rechargeable battery Aaa energized battery AA+AAA battery can be ener
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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2 PCS Battery Ladder Clear AA AAA Combo Battery Box Kit Organizer Case for 35 AAA & 27 AA Batteries Wall Mounted Battery Holder
Aliexpress UK
Turn the 7th to the 5th tube, you can use the 7th battery as the 5th battery. In normal use, when the No. 5 battery is out of power, and there is a No. 7 battery around, this can be used. Generally, there are only two slots for the No. 7 battery, but there are four No. 5 slots.
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PALO 1.2V AA AAA NIMH Rechargeable Battery Batteries 2A 3A With 12 Slots LCD USB Fast Battery Charger for 1.2V AA AAA Battery
Aliexpress UK
AAA to AA size battery adapter. You can use your small (AAA size) batteries as AA batts.
eBay
AA /AAA/18650 Battery Holder Case 1/2/3/4 Cell Battery Holder Storage Box with Connect Black Red Wires ABS Environmental Protect
Aliexpress UK
1 x AAA battery can replace AA battery to use. Small size, easy to carry.
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PKCELL 120PCS AAA LR03 Batteries LR06 Battery 1.5V AAA AA Alkaline Battery AAA Batteries for Keyboards Clocks Toy Remote Control
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.
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Original AA Rechargeable AAA Battery 1.5V AA 9800mAh/AAA 8800mAh for Clock Radio Video Game Digital Camera AA AAA Charger
Aliexpress UK