Why cant you use a AAAA Battery instead of 2 AA Batteries.? - Quora
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Amazon.com: Duracell 309/393 Silver Oxide Button Battery, 1 Count Pack, 309/393 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household
AAA battery - Wikipedia
Amazon.com: VARTA Longlife Power AAA Micro LR03 Alkaline Battery (10-Pack) - Made in Germany - Ideal for Toys, Torches, Controllers and Other Battery-Powered Devices : Health & Household
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