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I should know this, but I just can't figure it out in my head or find it on the web....
What's the difference between a 12 volt car battery and say a 9 volt battery used in little gadgets?
Obviously there is a big difference in the amount of power that can be put out...but what is it measured in? I searched Wikipedia, it's not amp-hours and I don't think it's joules....but for example...if I took two 6 volt lantern batteries, hooked them in series for 12 volts, I highly doubt if I could come close to getting an engine to turn over....what is the difference measured in? Internal resistance in the battery? How much current can be pushed out all at once?
I am so confused!!!!!!!!!!!! These are the things that keep me awake at night....
one is a dry cell type and one is a wet cell (like car) batteries. i think. who knows what they make now a days i am sure there are some master minds on here that can give you the lowdown on batteries. dry cell-wet cell-deep cycle-starter batteries, rv, marine. im confused now. :D :D
Now you understand my dilemma...if you keep thinking about this, your brain will explode or you will go insane....it's been bugging me since 3 this morning....
your a riot annie :D . heck dont let it bother you till your head explodes,just remember what battery goes where. im kinda the same way about things i dont understand.drives me up the wall. mostly things my kid can do on the computer. go here,do this,torrent this, file that,click here, go there. im like HUHHHH.
I've always been like this, lol....I just wanna know everything!!! It's funny, I went to Tech school but it was 8 years ago and all the stuff about electricity, analog/digital electronics that I knew so well at the time has faded because I don't really use any of it to fix telephone systems (my job)...the old cliche use it or lose it...heh...
Your comparing apples and oranges.
Lead acid batteries are rated in amp/hour. Such as your car battery could be rated at 350 amps/hour or higher. Lead acid batteries (along with ni-cad) batteries are usually used in high amperage starting circuits. Aircraft typically have ni-cad batteries used for starting.
The small batteries are just that. They are so small and simple that they are typically used in ciurcuits with almost no draw, and therefore are rated in volts, not amps, as there virtually is no amperage capacity for these batteries. A good example would be a flashlight. 1.5 volt batteries. How much do you think that little bulb actually draws to make it illuminate? Almost nothing.
The terminology may not be correct, and there's a lot more to it, but this should give you a brief idea of the comparison.
"The Smallest Station In The Nation"!!! Makin' lots of rackit in a small area!
volts = current in amps x resistance in ohms
volts = power in watts / current in amps
power in watts = volts x current in amps
ohms = volts/amps
amps = watts/volts
I know Ohm's Law, but what I was talking about was.....if you took a 6 volt lantern battery and a 9 volt alkaline, wire them in series for 15 volts, there is no way you could turn over an engine....even though the voltage should be right...or in this case more than right....so there has to be some difference between 12 volt car batteries and little batteries you buy at Circle K....
A double A 1.2 volt NiMH (Nickel Metal Hydride) rechargeable battery has a rating of 2500 mAh which is tinny 2.5 Ah. A Red Top Optima battery puts out 1000 cranking amps.
So you would need 400 double A batteries in series to get that 1000 amps and you would be pushing 480 volts which would kill you if you touched them. But those batteries would likely melt down if you did try to draw any of that current from them.
Yeah you can get a transformer (if you have any old adapters AC -> DC) and hook
that battery up in reverse... I think.. its been a long time since I have done this,
add a switch too. But you can shock the he11 out of yourself and others.
I use to do it with the 9v batteries shock my brothers it was great fun.
All this talk of batteries reminds me of the maxwell ultra-capacitor.
They're different because they are rated for a million recharge cycles and a ten year life.
Would be dream to run those with a motor-maul, but i would imagine not cheap.
i am sure there are some master minds on here that can give you the lowdown on batteries. dry cell-wet cell-deep cycle-starter batteries, rv, marine. im confused now. :D :D
