C-Cell Into D-cell Battery Hack.




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

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.

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.....

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.



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    20 Discussions


    9 years ago on Introduction

    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


    11 years ago on Introduction

    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.

    2 replies

    Reply 10 years ago on Introduction

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


    11 years ago on Introduction

    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.

    4 replies

    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)


    11 years ago on Introduction

    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.


    Reply 11 years ago on Introduction

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