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![Amazon.com: Power Supply for 3 AA, AAA Battery, (2 Pack) 18500 Protected 3.7 V Rechargeable Battery 1600mAh with Charger - [Replace 3 AAA, 3 AA Battery for 21, 51 LED UV Flashlight ] : Health & Household](https://m.media-amazon.com/images/I/710Z5KFLY5L.jpg "Amazon.com: Power Supply for 3 AA, AAA Battery, (2 Pack) 18500 Protected 3.7 V Rechargeable Battery 1600mAh with Charger - [Replace 3 AAA, 3 AA Battery for 21, 51 LED UV Flashlight ] : Health & Household")
Amazon.com: Power Supply for 3 AA, AAA Battery, (2 Pack) 18500 Protected 3.7 V Rechargeable Battery 1600mAh with Charger - [Replace 3 AAA, 3 AA Battery for 21, 51 LED UV Flashlight ] : Health & Household
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Everything You Need to Know About the 18650 Battery
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![Amazon.com: Power Supply for 3 AA, AAA Battery, (2 Pack) 18500 Protected 3.7 V Rechargeable Battery 1600mAh with Charger - [Replace 3 AAA, 3 AA Battery for 21, 51 LED UV Flashlight ] : Health & Household](https://m.media-amazon.com/images/I/61KP0UH0F9L._AC_UF350,350_QL80_.jpg "Amazon.com: Power Supply for 3 AA, AAA Battery, (2 Pack) 18500 Protected 3.7 V Rechargeable Battery 1600mAh with Charger - [Replace 3 AAA, 3 AA Battery for 21, 51 LED UV Flashlight ] : Health & Household")
Amazon.com: Power Supply for 3 AA, AAA Battery, (2 Pack) 18500 Protected 3.7 V Rechargeable Battery 1600mAh with Charger - [Replace 3 AAA, 3 AA Battery for 21, 51 LED UV Flashlight ] : Health & Household
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Spacer for 18500 Li-Ion cell to replace the 3xAAA battery compartment in those cheap and cheerful flashlights : r/functionalprint
