Battery Converter Adapter Tube Sleeve for a 18650 to 20700 | eBay
STL file 18650 battery adapter - flexible converter - replaces 2xC batteries・Model to download and 3D print・Cults
BESTSUN 3.7-4.2V Li-ion AC Charger Wall Charger Adapter with LED Indicatior for 18650 Battery Powered Rechargeable LED Flashlight Torch and Headlamp with Charging Port - - Amazon.com
18650 Battery Adapter for 2 C-Cells by cohocarl - Thingiverse
10 Pieces 18650 Tube 18650 Battery To 26650 Adaptor Converter Adapter For 26650 Led Flashlight Torch - Portable Lighting Accessories - AliExpress
Amazon.com: uxcell AAA Battery 3x1.5V Storage Adapter Case,18650 Battery Holder Converter for AAA LED Flashlight 1 Set : Electronics
Li-Ion Charger (2 Slot) + 3 x 18650 3.6V Li-Ion Button Top Batteries (3400 mAh)
2Pcs 18650 to 26650 Battery Converter Case Sleeve Adapter Plastic WG.AY | eBay
Li-ion 8.4v Adapter Power Supply Charger | Charger Lithium Batteries 12.6 V - 8.4v - Aliexpress
Amazon.com: 18650 to 21700 and 20700 Adaptor Battery Storage Container(18650 to 21-700 and 20-700 Adaptor) : Musical Instruments
Backscatter 18650 Dual Battery Package with Charger & Battery Case