DIY Dummy 18650 Magnetic Battery Charger Adapter - A solution to charging 26800's and other large cells without having to buy a new charger (details inside) : r/flashlight
Buy Red POM 18650 Battery Adapter Tube for 20700 / 21700 Battery Mod
Wejoytech - New 18650-20700 battery adapter from Wejoytech: * It can be used for all box/mod/kit etc; * Easy to take and use for your devices; Maybe you need this item for
Uxcell 18650 Battery Protective Sleeve, Battery Tube Adapter, Battery Holder Converter for 26650 LED Flashlight 12 Pcs - Walmart.com