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1 Pcs 1/2/3/4 Section Plastic Battery Case Holder Storage Box For 18650 3.7V DIY | eBay
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Amazon.com: 18650 Battery Case Holder, 4 Pcs 2 Slots x 3.7V DIY Battery Storage Box, in Parallel Black Plastic Batteries Case for 2 x 18650 Ltvystore : Electronics
Organize Your Batteries With This 4-slot 18650 Power Bank Case - Wire Lead Included! - Temu
Amazon.com: 4S 18650 Battery Holder Case Box for 4X 18650 15V Li-Ion with 6" Wire Leads by Envistia Mall : Electronics
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Battery Holder for 3x 18650 with wire lead
4-Way 18650 Battery Holder - DFRobot
Best 18650 Battery For Flashlight 3500mAh (Free Battery Case) Orbtronic