Hi guys.
This is my first instructable. Enjoy!

So today I am gong to show you how to make from old pc speakers to speakers on battery.
It's pretty basic and I have a lot of pictures. ;)
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Step 1: Items you need

The tools you need:
-A cross screwdriver
-A 9v battery
-A 9v connection thing, see picture (don't know how to call it)
-A soldering iron (not nessecary)
-A hot glue gun (not nessecary)

Step 3: Taking apart

Now take the board what everything is connected to, and you will see a couple of wires: One for the otherspeakers, a pair for the wire of the speakers and one for electricity. Thats the one we need.
If you watch, u will see the electricity wires russing to the AC/DC adaptor, and then to your plug.

Then take your screwdriver, and screw the adaptor thing out.

Take your your pliers and cut the wires that are connected to the the two plastic tops.

Now turn your adaptor out and you'll see a sticker with the volt and the amp�re you need to use it.

Mine was: 9v and 0.6A.

Step 4: Connecting the wires

Now cut the 2 wires that are leading to your electric board. Strip them.

Mostly, the left one (the first one) is + and the right one is -.
You also can check it using the volt meter.

Now mark your + and take the 9v connector, the red one is + and the black one is -.
Solder them together.

Then take some tape (I didn't find my electric tape, but duck tape will do the job ;) and wrap it around the place where the cables were soldered.

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ariaza1 year ago
i think 12 volt can make more higher until 24 v dc coz of the concern of the transformers coz poor quality mean lack of crank the boost of your speaker so can but should check the cap if the volt more over to 50 to sure your capacitor is not been explode and make your speaker not been unusefull
You sir are a genius. Detailed instructable, organized steps. I favorited it!!
dmcdaid1 year ago
Brilliant run-through! Sometimes the best thing to do is just to crack something open and have a look at what is going on inside something for yourself...

For the people commenting saying they are connecting 12V batteries, there is no need to do this unless the transformer you have removed tells you to do so. The speakers only ever recieved what the transformer from the mains gave it and nothing more. If it says 9V, then stick with a 9V battery. It worked perfectly when derived from the mains and it will work perfectly powered straight from a DC battery.
Stefniamoo1 year ago
Could i use a 12 volt rechargeable battery instead ?
i find a simple 9volt battery like the one you used to bee too little. when you can use a bigger one.

I would of course take in the amp needed and such. but i could use a rechargeable 12 volt battery instead right?
Sassah1221 year ago
This instructable is great but the 9 volt connection thing is called a battery clip. I am one of your followers because of this great instrucable.
Mike13962 years ago
Your instructions are great. Just wondering, did you detach the wall wart from the speakers all together? Did you hook up the battery right with the chip or did you attach the battery to the wall wart, and then to the chip. My speakers turned out to be AC not DC so I'm a little confused on what to do.
st0rm (author)  Mike13962 years ago
You have to get rid of the wall wart. Just connect the battery wires to the wires that are left from the wall wart. It'll just be a clean DC to DC connection.
Peter20113 years ago
are you danish?? its a danish/german plug.. if so then you will understand this DET ER BARE FOR FEDT!!! det virker fint men jeg bruger 12 volt og 2 9V batterier med end begrænser til 9 fordi det holder meget længere(jeg gemmer batterierne inden i)
its a european plug
taoybb-TH5 years ago
Your speaker need 12V Battery.If you use 9V battery I work but quality is not 100% because VAC out from transformer are 9VAC when Rectifie(AC to DC) DC volt out is 12VDC ( 12VDCout = 9VAC * 1.414).If you untrust me use your 9VAC Transformer and use this circuit
*Chang 12VAC to your transformer
i thought to hook up a 12 volt battery to it too, but the capacitor on the amplifier chip are rated 10 volt.. won't the 12 volt fry the caps..>?? although I checked the amplifier IC can handle upto 15 volts, but the caps concern me..
Arano taoybb-TH3 years ago
you are wrong: the voltages written on the transformer are the mean of the rectified wave or the equivalent DC voltage
taoybb-TH Arano3 years ago
OK!! Try plug in your transformer and measer by AC voltmeter..... or reattach a tranformer and check dc at IC... think you are worng not me.I haven't ever see tranformer that written a DC Voltage on it. From my 3Y experiean about Hi-End amplifier i dare to say you wrong about transformer.
Arano3 years ago
those 2 wires are both + and -... the 4 diodes in the up/left corner are a rectifier so you cant wire a batterie to those wires in a wrong way
projectguy4 years ago
 By the way the 9v connection thing is called a 9v battery clip.
st0rm (author)  projectguy4 years ago
Ok, Thanks :)
johnray2k4 years ago
I have a 12v speakers, but I dont know how what to do? Should I double the 9 volts? so it can work?
st0rm (author)  johnray2k4 years ago
Hi John.

I think you could try to connect a 9v volt battery and check if it works.
You also can buy a 12 volt battery in a store (
Or if you dont really need your boxes you could connect them to 2 9v batteries and hope it wont get a over voltage.

st0rm (author)  pancho del rancho5 years ago
How much volt and ampere did you speakers required?
um im not sure they were computer speakers but they use a usb not a plug so i cut the usb cable i got the black( negative) and the red(positive) but im really not sure but with 12 volts almost gets it on so ima try in with 24 volts. any ideas on how to find out
st0rm (author)  pancho del rancho5 years ago
Usb is only 5 volt. So be carefull. Maybe you can screw your speakers.
USB powered devices are designed for a maximum of 5V at 650mA. If you put 9 volts in, maybe you fried the voltage regulator, or the main amplifier IC, and then cooked it further with 12 volts. Either this or it's something simple, like a leaky or bursted capacitor, or a burned resistor/pathway. check your circuit board carefully to find any defects.
st0rm (author)  pancho del rancho5 years ago
Well, it could help if you first turned you caps lock on OFF. Secondly, could you write here all the things that are on the back of you speakers on the sticker. That would help a lot. Thank You.
all it says 3Q and 3W but i dont no why they dont work ima get ones with a wall input i gave up on the computers i alraedy destroyed the case it went in to i have with a black and red is there anyway to connect them to a mp3 line
I know it's too late, but you ran into a fundamental error.

You were trying to hook the speakers up directly to DC power!
What this 'ible is doing is supplying power to the amplifier circuit of the powered PC speakers.

the rating on the speakers... 3Q is a new one for me. Sure it's not 3Ω 3W?
Not that it should matter much, because the amplifier circuit in the speaker case SHOULD be matched to properly drive the speaker inside it.

tinkerboy5 years ago
Good concept, solid instructable. I'm considering doing something like this soon. But a 9V battery holds very little energy. I'm guessing on moderate volume it would barely last an hour. I would prefer something with a few more Ah's and rechargeable.
st0rm (author)  tinkerboy5 years ago
Thank you for your comment. Yes It's true, it holds a little bit energy. I think you could make it rechargeable: just buy a battery charger (you know, the ones that are used for recharging mobile phones) and use a usb charger to charge it. A very simple mod.
or, mount a 9 volt battery holder on the outside(run the wires though the power cable opening?) and have the ability to change(or recharge in a normal charger) the battery any time you'd like?
st0rm (author)  ironsmiter5 years ago
Yeah, but you'll have to remove the converter first,. But I think it won't have the same effect like mine version, because it would be a shame if you have alot empty space inside the speakers (as mine).
didn't you remove the converter anyhow? I was just thinking how much easier it would be, not to have to disassemble the speakers every couple hours, just to change the battery. I suppose, you could STUFF the empty space full of 9-volts, wired in parallel. That would increase run time, and still be an all-internal solution.
st0rm (author)  ironsmiter5 years ago
Good idea! But if you do that, I would find an solution to put the cable somewhere. Because I think. it would be annoying if you take the speakers with you. But yeah. I totally agree with your option.
I GOT IT! take a couple of rechargeable 9V batteries and put them on the inside. then run one of those things you plug a wallwart adapter into (i dont know what to call that.) basically what i mean, is make the 9 volts able to be recharged without removing them from the case. you could just plug a power source into the speakers and it would charge the batteries.
Given what I've learned since I last posted here....

If you were going the internal rechargeable route...

Three 18650 Li-ion cells from a broken laptop, plus a $2 charging/regulating circuit would be the way I would go...Tons of power, pretty good charge holding capacity, and an hour of full volume rock won't leave you with a hot, dead 9volt.
But for initial low-cost, safety, and "easy mode" 9volts are still the way to go.

And the thing you're thinking about is called a DC power jack.
st0rm (author)  ironsmiter5 years ago
All u said is correct.
Im happy that this project helped some people out.

Im planning to take other speakers apart, and make it like an upgraded version of this instructable.
But this time im going to take the speakers completeley apart and put them in lego blocks, so then they become a pair of lego speakers.

hook up two nine volt batteries in parallel. that way the voltage stays the same, but you will have double the milliamp-hours.
nine volts are several hundered milliamps too weak
st0rm (author)  Zaphod Beeblebrox5 years ago
It works for me :)
It will draw the amount of amps it needs. the problem is a nine volt battery only has a few milliamp-hours. That means it wont last very long.
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