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AA to C Battery Adapter

by jwags55, published

AA to C Battery Adapter by jwags55 Nov 26, 2014
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18664Views 5317Downloads Found in Electronics

Summary

Another AA to C battery adapter. I really liked MORE_MPG's design, but wanted to tweak it slightly.

Wall thickness is 0.75 mm.

Autodesk Inventor source file and STEP file included.

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Unless C batteries cost 4x as much, this is not a savings. The energy store of an alkaline AA battery is 2,122 mHa. The same C battery is 7,800 mAh. So in other words, the C batter will last 3.6x as long! Or you will throw away 3.6 AA batteries for every C battery. That is a theoretical limit. Batteries can not go to zero while still maintaining a constant voltage. In actual usage you will be throwing away 4-5 AA batteries for each C battery.

I think it is a great idea for an emergency situation where you need C batteries, but in the long run you will not save money.

Costco sells AAs amazingly cheaply (~75 for $~10) and doesn't sell C or D. Also, AA NiMHs can be acquired cheaply, while C and D are much less common.

Mar 24, 2017 - Modified Mar 25, 2017
jwags55 - in reply to PacketPaul

Yes, C batteries have much more capacity and typically have a lower $/mAh . There are non-typical situations where these adapters can be beneficial. For example, I receive about 50 AA batteries each year for free that would normally be discarded after about 5 minutes of use in a medical tool. Thank you for your input. I'm sure others may find it helpful.

I didn't know you could do that!!

Comments deleted.

Sweet! Just what I wanted, thanks for the design. They're modular, quick to print, far cheaper then buying mass produced ones; even when printed in Taulman 910.

Great design, works flawlessly. Thank you.

If you made a solid version, the user could choose how thick to make the walls by specifying no infill and no top/bottom layers, and adjusting the number or width of perimeters.

Perfect! Huge saving over C batteries!

Great!
It need only 8.5cm3 of filament per 8 items. And the result looks great! Good choice to finish the last 2-3 meters of filament, and also useful!

Looks beautiful.

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