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18650 Battery Holder 18650 Battery Storage Box Case For 2 X 18650 With Dc 5.5 * 2.1mm Power Plug Series Connection - Battery Storage Boxes - AliExpress
18650 LITHIUM ION RECHARGEABLE BATTERIES (2-PACK) – ILLUMAGEAR
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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
5600mAh 2X 18650 USB Power Bank Battery Charger Case DIY Box For iPhone US | eBay
18650 Lithium Ion Rechargeable Batteries, 20-pack (10 x 2 packs) - (HA | Linemen's Supply