January 18, 2021
Description
Lets you put 21700 cells in an ISDT C4. Requires 4 pieces of 10mm or thinner nickel strip to work properly. I recommend folding the nickel strip over at the top to create a "spring" like effect when the battery is inside, providing a more secure fit
Included STEP for modification.
Printed flat side down w/ supports.
License:
Creative Commons - Attribution - Non-Commercial