Introduction: C-Cell Into D-cell Battery Hack.

Picture of C-Cell Into D-cell Battery Hack.

Your Flashlight battery are DEAD!!

It uses D-cell, but you only have C-cells. Here how you can make it work.

Step 1: What You Need.

Picture of What You Need.
OK Its at night. You got a flat on a dirt road, and your cell has no signals. So you need to change your tire.

GOOD NEWS: You got a jack, a spare WITH AIR!, A flashlight.

BAD NEWS: Flashlight D-Cell batteries are DEAD!

OK you have your Boom-Box, with good batteries, But it has C-Cells.

OK here is what you have:
1. Flashlight
2. DEAD D-cell batteries
3. good C-cell batteries
4. Sheet of foil.

Here how to make it work:

Step 2: What to Do.....

Picture of What to Do.....

There is a 12 mm length difference between a C cell and a D cell, and quarters are about 2 mm thick, so if your flashlight has a really weak spring it could take bit more foil to do the job.


think2x (author)2009-08-07

If you use some 1" schedule 40 pvc pipe as a sleeve it can be done permanently. In my "5D" maglite I cut a sleeve and it now uses "6C" batteries to overdrive the stock bulb making it brighter. I only had to slightly stretch the tail spring for better contact. In my "3D" maglite I use "4C" by using a sleeve and flipping the tail spring upside down. D-cells cost 2X C-cell batteries

Aerospaceman (author)2007-09-14

According to a Popular Science article a while back, they found very little difference between the cheap batteries and the name brand for basic useage. You can go to the Dollar Store or your local Wal-Mart or Fred Meyer and get some cheap but useful batteries.

baneat (author)Aerospaceman2008-05-14

I did the tests myself, and the real ones last 40x longer

thoraxe (author)baneat2009-05-15

yeah, anyone will notice good quality Duracell or energizer works way better than dollar store batteries

baneat (author)2007-10-27

In Britain the Pound-shop AA's last for about 10 minutes in a gameboy advance. Don't know about america, but that doesn't apply where I live.

mettaurlover (author)baneat2009-01-07

... what type of batteries were those? i mean, what brand?

themeatloaf (author)baneat2007-10-27

NOTE to US readers: Pound-Shop is like Dollar Tree or $1 or Less in the US.

baneat (author)themeatloaf2007-10-27

Sort of, A pound is almost twice as much as a dollar, but you get the point.

Redgerr (author)baneat2008-07-20

same difference though :P

Matt D655 (author)2008-07-18

youre a smart guy.

Matt D655 (author)2008-07-18


Derin (author)2007-11-04

pst what is the cost in YTL?

!Andrew_Modder! (author)2007-08-28

ya it works, but i ALLWAYS have EVERY battery i will EVER need (aa,d,c,9,aaa) because i have the Battery Rack 40 see here: it holds 40 batterys and has a built in battery tester!! Red for bad Orange for Good green for Excelent

Yep I have one too, but not away full or in the car.

you have spare cs and foil in your car? and also batterys can be bought at the dollerstore (good brands, surprisingly, but not duricell or energizor)

No spare Cs, but yes foil, It can be used if I blow a fuse.

um kay. :-|

Myself (author)2007-08-28

Aww, videos are cheating! They're hard to skim, hard to browse at work, and hard to print. Not that I've ever printed an instructable, I'm just sayin'. Videos are a nice help for things like knot-tying that are just hard to do with pictures, but I think this should really be a plain old series of pictures.

tomonto (author)2007-08-28

why would you have a sheet of tin foil with you but not batteries?

themeatloaf (author)tomonto2007-08-28

As I said in the video you can use coins or washers. I have Duck Tape and foil in my car.

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Bio: ***Look for new video's and Instructable on the 2nd and last Tuesday's of every month.***
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