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Amazon.com: AA Rechargeable Battery 3.7V 5800mAh, Large Capacity Li-ion Battery, Superior Flashlights for LED Torch, Flashlight, Headlamp, Electronic Devices, Not AA AA Lithium Batteries,4 Pack : Health & Household
Amazon.com: LCLEBM 3.7V 3800mAh USB Rechargeable Lithium Battery for Button Top with 2 in 1 Charge Cable for Flashlights, Camera, Headlamps, Doorbells, RC Cars (2 Pack) : Electronics
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GTF NEW 14500 Battery 3.7V 2300mAh Rechargeable Lithium Battery 14500 AA Li-ion Cells for Torch LED Flashlight Mini Fan Gamepad - AliExpress