Uxcell 18650-Battery Protective Sleeve, Battery Tube Adapter, Holder Converter for 26650 LED Flashlight 4 Pcs - Walmart.com
STL file 18650 battery adapter - flexible converter - replaces 2xC batteries・Model to download and 3D print・Cults
18650 to C and D cell adapters | Candle Power Flashlight Forum
3D Printable 18650 Cell to 2x C-Cell Battery Adapter by Derek Tombrello
Streamlight - Battery Chargers; Battery Size Compatibility: 3.7V; Battery Chemistry Compatibility: Lithium-Ion; Charging Time (Hours): 3.50; Charging Time (Minutes): 210; Maximum Number of Batteries: 2; Voltage: 3.70; Includes: 120V AC Adapter; USB