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Spacer for 18500 Li-Ion cell to replace the 3xAAA battery compartment in those cheap and cheerful flashlights : r/functionalprint
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AA 3A 3500mWh 1.5V Li-ion Rechargeable AA Lithium Battery Spare Rechargeable Batteries (18650)-Simply JuJa-$14.95
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2x 3-aaa Battery Holder Cylindrical Case Plastic for 18650 7/8" Flashlight Round for sale online | eBay
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Uxcell AAA Battery 3x1.5V Storage Adapter Case,18650 Battery Holder Converter for AAA LED Flashlight - Walmart.com
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