AA Battery Adapter to C (LR06/HR06 -> LR14/HR14)

Jogi's Battery Adapter AA → C

C batteries / Baby batteries, LR14/HR14 - these things are not used so often nowadays

If the wife then buys high-quality real wax LED candles, suddenly no button cells, no AAA, and no AA batteries are required, but C batteries - the thick ones

What to do?
Rechargeable batteries are also only available in AA format

So I quickly downloaded an adapter from the web and printed it - it doesn't fit
The next one - wobbly
Another one - stuck!

So I fired up Freecad and drew one myself!

And here it is: Jogi's battery adapter for AA to C!

The dimensions are based on the official values of the IEC standard:

AA batteries (Mignon) have a diameter of 14.5mm and are 50.5mm high
C batteries (Baby) have a diameter of 26.2mm and are 50mm high

Note: Since there are apparently some battery compartment manufacturers who build smaller compartments, I have added a version with a 25mm outer diameter
If required, please use the alternative print profile: Batterieadapter_aa_to_c_smaller_fit - available as 3mf and stl!


After a few attempts, I now have an adapter that holds the battery well, but also releases it again and fits into the battery compartment. Even 0.5mm makes a difference there!

Side recesses save material, and if it ever gets stuck, you can use pliers to pull the battery out again if necessary (carefully, of course!)

With only 14g of filament, this is great for printing with leftover material

Tested in 6 candles and 2 radio clocks with Eneloop battery, Ikea Ladda battery and some simple batteries. A total of 16 pieces printed so far. There will certainly be more :-)

Easy to print. Have fun!

PS: If you have too many AAA batteries, just take the AAA→ AA adapter, which is available here:
https://makerworld.com/en/models/685717

Update 19.11.24: I found a device that the parts don't fit into - China junk!
Therefore, I've added the "smaller_fit" version - slightly thinner diameter