Introduction: 9v Battery Safe

Picture of 9v Battery Safe

a safe made from a 9v battery.

Step 1: Wht You Need...

Picture of Wht You Need...

all you need it a dead 9v battery.

tip: you will need some wire cutters.

Step 2: Open It Up

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the first step is to open the top of the 9v just cut the corners and use a screw driver to pull it back

Step 3: Pull Every Thing Out

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take every thing out whats inside may vary but there all have 6 1.5v batterys.

Step 4: How to Fold

Picture of How to Fold

ok this is how you fold you money

1.fold in haft
2.roll tightly arond somthing
3.stuff all that in the battery

Step 5: Close It Up

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next to finish up your safe you have to make it look like you didn't shove money in it so fold the metal back over the top so it won't open.

Step 6: Your Done!

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have fun with you safe!


dll932 (author)2006-05-18

When you take the battery apart, you'll find 6 AAAA batteries-which are normally expensive.

dfault312 (author)dll9322006-05-19

Yeah... for all those devices I have that use AAAA batteries.

stonehenge360 (author)dfault3122006-08-21

most new lazer pointers take AAAA batteries

dll932 (author)stonehenge3602011-06-19

Also Streamlight Stylus flashlights-which we have dozens of where I work for inspection.

popcorn4lunch (author)2011-02-10

kewl, ill hav to try it :)

Junkyard John (author)2006-05-14

It would be interesting to keep one of the AAAA batteries in there to charge up a capacitor and shock anyone who tried to take the money out. Just an idea...

RUBiksCUbe (author)Junkyard John2006-08-17

It probably wouldn't be much of a shock. A single AAAA battery would probably just give someone a mild tingle, nothing really unpleasant. It would also be a dead give away that the battery is hiding something

Pie Ninja (author)RUBiksCUbe2009-12-02

Note that he said "to charge up a capacitor", 1.5V would give an un-noticeable shock, but by using it to charge a capacitor, 1.5V can become many hundreds.


send me something on how to do that.....

iwantacuracy (author)2007-08-02

thats creative. but i just keep my money in a mini m & m container. (very inconspicuous). i keep it in a box of lots of random stuff.

Pie Ninja (author)iwantacuracy2009-12-02

But what if the thief wants some M&Ms? :O

bombmaker2 (author)iwantacuracy2009-01-28

Remember, thieves look almost everywhere

yes, but will they look into a m&m; case? if they rob ur house, they'll know to check the 9v batteries.

only if there on this site all the time

jimtran93 (author)bombmaker22009-06-16


MattGyver92 (author)2009-04-08

You could even use a good 9V battery. Remove the two rod-shaped objects on the inside (and don't mix them up, or you've got problems) and fold the banknotes in half. Wrap them around the rod things and put them back in! Ta Da! Warning: Battery could leak or explode (be careful).

WARNING: Your money could also burst into flames

So, I guess it would be best to use a dead one then... Or just spend the money.

harry hardcore hoedown (author)2006-10-22

I got a photo of the inside of a battery with bricks wrapped together in a plastic film. It's not a great photo but you should be able to make out the bricks. I think (I'm not sure) they're used in those cheaper batteries because they're probably cheaper to make than 6 AAAA batteries.

ya, they're bargain store brand batteries,

i had a green one and it burnt my skin

Armaggedon (author)2008-12-20

is this dangorus?

lkik (author)2008-12-15

good until some one finds the battery and trys to use it so they throw it out

dancingal101 (author)2008-10-11

Nice idea. Who would think of looking in a freakin battery for money? Only thing is, how do you make sure nobody throws the dead battery out?

Von Klaus (author)2006-07-10

what about someone testing the battery (by licking it). he/she says it is dead and tosses it away?

gameboy7oa (author)Von Klaus2007-07-31

hahaha that reminded me of a time of playing truth or dare in a basement. my girlfriend decided to dare me to lick a 9 volt didnt end good for me

mrtools (author)Von Klaus2006-07-17

thats why its easier to put it in something so they dont

andy60 (author)2007-07-26

nice idea, but i would most definitley forget it was in the battery lol

hack124x768 (author)2006-08-25

About the "Battery Virus", It is possible for laptop computers. Most all Li-ion laptop batteries have a microcontroler built in for monitoring the voltage of the cells and cut off power when nessicary to keep them from going flat dead when in use, or exploding when charging (those suckers are freaky). It could be possible to load one's own code to that chip if it was a flash rom instead of a normal rom. If you are a windows user, look in your device manager and you will see your laptop's battery, that should be proof enough. Nice idea for the safe, btw. --Andrew

Yerboogieman (author)hack124x7682007-07-10

have you ever seen the movie bicentennial man cause you called yourself one and your name is Andrew. thats kool "be possible to load one's own"

the robot on that movie is named Andrew and calls himself one

hack124x768 (author)Yerboogieman2007-07-10

Yes, It's a good movie. I rarely call myself one, unless I'm in character or something.

klee27x (author)2006-05-15

Wow. This looks like a great way to lose your money.

Yerboogieman (author)klee27x2007-07-10

keep it in your project box

hjjhjhgjjh (author)klee27x2006-06-23

HAHA I agree in two days ill be like what is this trash and throw it out.

Trimaster (author)2007-04-15

i bet i would throw it away by accident XD

eviloverlord (author)2006-05-18

No they don't - it's a single battery of six 1.5V cells. A battery is a collection of cells.

mrtools (author)eviloverlord2006-12-08

that's correct. but they can be used as batteries if you want.

aforsberg (author)eviloverlord2006-12-06

dude, stop being a grammar prick.

paper warrior (author)2006-10-19

At least they said you came up with it at instructables.After reading the article i did a search and viola you were here.I seem to have a habit of reading the fine sideways print towards the spine.It's a really good project, that's why they put it there.

mrtools (author)2006-10-18

I just got that issue. I didn’t know they could do that well I guess they do that a lot but it never happened to me.

paper warrior (author)2006-10-16

By the way it's the November 06' issue.

paper warrior (author)2006-10-16

The people at Popular Science put this in their mag. Right on.

Guittarman10 (author)2006-09-27


stonehenge360 (author)2006-08-21

NOTICE! the AAAA batteries found in most 9-volt batteries are reversed, eg. the contact side with the "bump" is the negitive side as apposed to commertial AAAA's which have the positive side on the contact with the bump.

stonehenge360 (author)2006-08-21

I tried this with a Duracell and indeed, it had 6 AAAA batteries in it also, I took them out of the bottom which requires no cutting, all you have to do is bend the sides back, then I glued the top part to the inside along with 37 grams of lead weights for pine derby cars, therefore making it look and feel like a real battery. once the money is in, you can put the bottom on and no one will know the diffrence.

hivoltage (author)2006-08-12

great idea. i would try to make it look less tampered with. perhaps dremel off the sharp edges and use a magnet to hold on the door.

mewantbigboom (author)2006-08-11

sweet. u can hide cocaine in it or somthing

Eric Stanton (author)2006-08-09

My only question is how do you prevent someone from throwing the battery away when they attempt to use it and discover that it's dead?

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