3D Printed Battery Adapters

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Last seen: 5 days 13 hours ago
Joined: 03/22/2019 - 14:35
Posts: 27
3D Printed Battery Adapters

These adapters are 3D printed in PETG or Nylon filament (not the more common PLA which is not as resistant to heat and solvents) with solid brass and stainless hardware where needed.

Adapters with * have built in mechanical reverse polarity protection and require a button top or a raised positive contact. Protected cells are recommended.

14500 button top for use in 18650* – $6

14500 button top for use in 2CR123A lights* – $6

CR123A/16340 to 18650* – $7

18650 button top for use in 2C flashlight* – $8

18650 button top to work in 3C flashlight* – $10

2C cells to 2D – $9

3C cells to 3D – $10

2 AAA to 2 AA* – $6

3 AAA to 3 AA* – $6

2 AA to 2 C – $5

3 AA to 3 C – $6

Please add $6 for shipping within the USA. PayPal accepted.

I have these ready to ship. Note that batteries are not included.

I can also design and print other adapters – please let me know if there is anything else you might need.



14500 to 18650 adapter.


18650 to 3C (red) and 3D to 3C (blue) adapters.


2C to 2D adapter.

Edited by: xxo on 10/07/2019 - 17:35
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Last seen: 22 min 45 sec ago
Joined: 02/27/2019 - 18:44
Posts: 317
Location: Near Dallas, Texas

Hey, these look nice! I don’t need one myself, but it looks like good work to me.

If you want your pictures to show up in-line, you will need to add a “!” to both sides of the link.

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Last seen: 5 days 13 hours ago
Joined: 03/22/2019 - 14:35
Posts: 27

Thanks Much F0xx! I appreciate your help and kind words.

This one is the CR123A/16340 to 18650 adapter.