Amazon.com: 4 Pcs ICR 10440 Rechargeable Lithium Ion Battery,3.7v 350mah (10 * 44mm, Shorter Than AAA Size) : Health & Household
10440 Battery Rechargeable Protected Lithium Ion | Demonfire
High Quality 10440 Battery 1000mah 3.7v Rechargeable Lithium Li-ion Aaa Batteries Button Top - Rechargeable Batteries - AliExpress
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Amazon.com: ICR10440 Lithium Ion Rechargeable Battery 3.7V 350mAh with USB Charger (2pc Button top +Charger)(They are not AA Size Battery) : Health & Household