18650 and 21700 Battery Case
thingiverse
Combo 18650 and 21700 Battery Case. Designed to Carry an Adapter for a 21700 Battery Plus Two 18650 Batteries. The Adapter Essentially Serves the Same Purpose as a Single 21700 Battery, Making This Combo Extremely Convenient. The Fit is Very Snug, as I Intentionally Left No Play Between the Top and Bottom Cases Where They Interlock. You Can Opt for a Friction Fit or Take Some Sandpaper to the Edges to Create a Secure Grip. Alternatively, Use Magnets to Hold Them Together, or Combine Both Methods, Like I Did. I Successfully Printed My Case in PETG, Which Worked Flawlessly.
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