How to Open a 9v Battery

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Introduction: How to Open a 9v Battery

About: cheeze balls, mmm... cheeze...

with just some pliers and a good quality 9v battery you can open a 9v battery without damaging the internal cells so they can be used as a replacement AAA battery

oh and by the way THIS IS NOT DANGEROUS you are not opening up a cell you are opening up a battery (batteries have cells joined together)

Step 1: Gather Your Tools and Materials

go and grab your pliers and a good quality battery. I use a energizer battery but a Duracell might do it as well.

Step 2: Somewhere to Start

get your pliers and pinch the middle of one of the long sides then bend th metal back, don't worry about the dints in the metal it makes just keep going. you may have to do this a couple of times to get the metal lip up but when you do things suddenly get easier.

Step 3: Keep Going

keep going along the long side lifting the lip up until you get to the corners.

Step 4: Corners

corners are a bit trickier than the rest of the battery. use the corner of the battery that is closer to the fold in the steel. lift the lip of the other side then do the corner, usually the corner sort of scrunches up a bit but this is normal.

Step 5: Nearly There...

keep going on that shorter piece you started on and then do the opposite corner.

Step 6: Lift It

do the 3rd corner on one side and it should start to lift. pull it out after this happens.

Step 7: Those Little Extras

you will find at this point that there is a little piece of paper in there. pull that out to reveal the batteries.

Step 8: Shake, Shake, Shake!

give the battery cells inside a good shake and all of the cells should fall out along with the bottom. if you open up the bottom layered sort of thing you will find this silicon layer, i have no idea what it might be used for but keep it anyway.

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    35 Discussions

    I opened one of those up and I was like, "WHOA! What is THAT?!!?!?". Instead of finding some nice little AAAAs, I found a nice little plastic wrapped block of chemicals or something.

    Some 9v batteries have loose AAAA cells in them between the jumper plates, others have the cells tied together with spot welded straps. You should be able to rip the straps off though. Yet other batteries have flat rectangular (rounded corner) cells. I've seen those loose, wax-dipped and plastic-encapsulated, depending on brand and/or type.

    actually i used one of those battery's first but when it came to getting it out, the thing stuck so i had to delete all of the pictures and start again.

    Seems I have messed it up. The batteries started hissing, with bubbling.

    I think the silicon might be used to keep the plastic bottom from getting hot and melting. But what can I use those little batteries for?

    5 replies

    They are AAAA batteries.Not AAA batteries. They hold very little charge and cannot supply a good amount of current, so they cannot be used as AAA batteries.

    the silicon stuff is to put pressure between the cells and the connections it is hard but squeezable.

    they are almost the same length as AAA batteries, so you use the metal tabs stuck to the paper/cardboard as spacers, and use them as AAA's.

    I use the case to house small circuit projects. If you make your circuit board the right shape and size, you can fit 5v regulators for power supplies or other small circuits inside of it, poke a hole in the bottom part for a wire to go out, and you can reuse the terminals to connect to a "real" 9v for power (or to a battery pack that has the same connector).

    2 replies

    Oh, and Rayovac 9v's (fairly common) contain the stacked rectangular plastic-cased cells. I've taken apart two of them (dead ones) to use the case for electronics projects. These stacked cells are fairly useless other than as a 9v source, so I recommend using the battery first and then dismantling it for the case and terminal.

    maplin do to does it say on the positive terminal "us patent no 5691079 pat .pend in several countries"

    AAAA batteries are what you see in the pictures and are just the next size down from the AAA batteries.

    so ur saying i can take over the world by using low powered mildly annoying mining lasers??? my plans r finally becoming a reality!!!!!!!