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How to make 18V battery - Thanks for your help its sorted now :D Answered

Hi Everyone, I have a handheld dremel thing that needs a 18V power source to run at max speed, currently i ma using one 9V battery but the drill doesn't cut anything. SO i need to connect two 9V batteries to make an 18V power source, I have no idea how to do this can one of you geniuses help me ?? lol whoever helps me first wins a prize....... the prize is pride and a pat on the back (lol i hate it when teachers say that) Thanks Guys !!!!

Discussions

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Sandisk1duo

10 years ago

at leas you have a dremel :' (

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Narnies

10 years ago

you need to connect them in series so... pos to neg to pos and so on untill you reach the required voltage (+)9vdc(-) --->(+)9vdc(-) this will give give the 18vdc your after

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Derin

10 years ago

try using an old laptop psu they are strong and most are rated at 18V

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theburn7

10 years ago

all i know is to use a A23 12 volt battery, costs nuthin and if it doesn't work for ur needs, omen it and get a bunch of button cell batteries

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theburn7theburn7

Reply 10 years ago

aha! combine all of the 1.5V button cells from two A23 batteries to make 18v, tape them together and that is it!

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=SMART=theburn7

Reply 10 years ago

thats quite a good idea i think ill try that thanks :D

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skunkbait

10 years ago

You might try three of the square/rectangle 6v "lantern batteries" in sequence. As a last (expensive,but awesome)resort you could go with three 6v (rechargeable) motorcycle batteries. I don't think 2 of the little 9's will run it.

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GorillazMiko

10 years ago

What was the old battery?

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=SMART=GorillazMiko

Reply 10 years ago

i used to run it on a single 9V battery, but it needs at least 12V to go fast enough to cut things

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westfw

10 years ago

9V batteries of the type you show don't supply enough current to run big motors like a dremel. You'd be better off stringing C or D cells together. I suspect that 4 C cells (6V) will work better than the 9V "transistor" cell you're using now...

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NachoMahmawestfw

Reply 10 years ago

. If all you have laying around is 9V xistor batteries, hook two of them in series to get 18V.
  __________________  +  |                                      motor  |-------+ |-------+ |----------  -
. I'm with westfw, xistor batteries aren't going to provide the current you need for full-speed/full-load operation. Look at the cord on the grinder and look at the wires on 9V battery snap connectors.
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NachoMahmaNachoMahma

Reply 10 years ago

. Well, my "drawing" didn't turn out as expected, but you should be able to get the idea

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=SMART=NachoMahma

Reply 10 years ago

lol, i understood the drawing, ill try the series method first, but im going shopping tomorrow so ill go to the electronics tore and buy a big battery. Thanks for your help !! :D

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=SMART=westfw

Reply 10 years ago

i also have the large 1.5v cylinder shaped ones, would these work??

640917_0.jpg
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GorillazMiko

10 years ago

Just use 9v battery clips. :P Or just connect them together, that works, but wastes the battery's energy.

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tech-kingGorillazMiko

Reply 10 years ago

what are you talking about? i really dont understand you. do you mean in parallel? thats still 9 volts, but about twice the run time.

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tech-king

10 years ago

wire the batteries in series; the plus of one to the minus side of another