18650 to C adapters?

letschat7

Flashlight Enthusiast
Joined
Dec 7, 2022
Messages
2,451
Location
West Virginia, North America
What are my quality options for some 18650 to C adapters?

On top of this most of my lights are unusual lengths such as 5-7 C although I have 2 and 3 cell C lights with the 2C being covered. I'd like to use this length to get 3 or 4 18650 battries and not be running one cell with 5 spacers.
 

ghostguy6

Enlightened
Joined
Jan 21, 2007
Messages
280
Location
Ed, Ab
By my math you could get 3 full 18650's into a 5C tube and have an extra 55mm to fill. The 7C tube would hold 5 full cells and have an extra 25mm to fill.

I could easily design some adapters for you if you have someone local who can 3d print them for you. I could print them for you but shipping from Can to the US is expensive..
 

ghostguy6

Enlightened
Joined
Jan 21, 2007
Messages
280
Location
Ed, Ab
Since you didn't answer my PM here is what I came up with. I had to host the file elsewhere since the file format is not compatible with this site . This will allow you to view the files in 3d View https://www.printables.com/model/787873-5-c-to-3x-18650-and-7-c-to-5x-18650-cell-adapters

A quick mock up of some cell adapters I made up for use in Maglites. It requires you to glue the 2 halves together. You will also need to supply a ¼" OD spring long enough to accommodate the extra spacing. 25mm long for the 7C and 55 for the 5C models. Make sure the spring is thick enough to handle the current of your cells without melting.
 
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