Battery Info Needed

[MoparWoman Jamie]

Hi guys, maybe someone here can be of better help with me. I been talking with a lady today by email and it seems I'm not getting to far with getting answers. So I'm going to try here.

I need to know say what battery's and how many would make 2amps and say 12volts? the space is limited also. Thanks in advance for any help.

[envious8420]

Hi guys, maybe someone here can be of better help with me. I been talking with a lady today by email and it seems I'm not getting to far with getting answers. So I'm going to try here.

I need to know say what battery's and how many would make 2amps and say 12volts? the space is limited also. Thanks in advance for any help.

what are you trying to power?

[MoparWoman Jamie]

what are you trying to power?

A project.

[Joe Handley]

Sounds like you'll need ten 1.2 volt, 2000mAh, Nickle Cadmium Metal Hydride battery cells connected to each other in series. If you have some leeway with how many volts you need, you could try a 3 cell, 11.1 volt or 4 cell, 14.8 volt, 2000mAh Lithium Polymer battery pack as well. If you're limited in how much space you have, I'd look at Li-Po's made for "park flier" type RC aircraft since they're small and light when compared to Ni-Cd's and Ni-MH packs, especially at that voltage!

BTW, 2000mAh is 2 amps, 1 amp hour in storage is the equivalent to 1000 Milli amp hours in storage if anybody doesn't already know that

Edited November 22, 2010 by Joe Handley

[wisdonm]

If you are working with LEDs you should use a 4060 chip. They cost less than 30 cents.

[MoparWoman Jamie]

Batteries are usually rated in milliamp-hours for small cells like AA and AAA cells and go up as you increase the size of them. This amounts to how much current they can release over an hour. Things you need to figure out: You have a voltage and a current 12 Volts and 2 Amps. Do you need this power continuously or for peak use for a short time? Do you want single use or rechargeables? Is weight a isssue? If you're looking at 12VDC@2A, it sounds motorized and relatively high current: How long do you want to run between charges, and how much weight can you tolerate? A lead/acid gel cell might get you there. NiMH (nickel metal hydride) cells might also do the trick. As you're talking to battery sales people, try to fill them in on what you're doing and they'll be able to help out better. They'll be able to suggest which type will weigh the least, be the smallest and get the job you want to do done reliably.

Okay, let me ask the qiestion alittle more clearly.

How many volts and amps are in 1AA? How many amps are in 1AAA? Amps in 1D?

Will this power be on continuously? I don't know to be honest, but the answer is probably not though.

Will it be on only at times? Yes.

Do I want a single or rechargeable? doesn't matter to me to be honest just as long as it works (LOL), but something is telling me rechargeables though.

Is weight an issue? Yes, kinda just like the space is.

How long do I plan on running it between charges? That all depends, if I'm or a friend of mine has it at an event or anywhere, who knows.

How much weight can you tolerate? weight is kinda a issue also some what, I'm trying to keep it light weighted but have all things working though.

[Joe Handley]

Not sure what the amperage of an alkaline is and I can't find the amperage marked on a pair of Energizer Lithium AAA's I have in front of me right now. If weight and size will be a concern, look at lithium batteries in either form.

[MoparWoman Jamie]

Okay, someone please correct me if I am work with this. I have alot of use battery's here in AA and AAA and D's as well. Now correct me if I am wrong but on the AA it reads 1.5v, now wouldn't two of them be 3v?

The reason I ask is I know a store over in town that carrys a wide range of battery's for a very very cheap price and that is mostly where I get all my battery's from for my flash lights and other cameras.

I was just setting here and after the follow member mention about the battery in front of them.. it dawn on me that I had a whole box full of used ones in the back room (doh). Then it got me thinking, if I have to I will build a battery. LOL

[Joe Handley]

If you connected them in series then yes, 2 AA's would be 3 volts, but if you wired them in parallel, you'd still have 1.5 volts, but double the run time.

[ChrisPflug]

AAAs, AAs,Cs and Ds are 1.5 Volts- more details about the project will yield better info

[mredzadventure]

A lot of rechargeable Ni-cad batteries run about 1.2 volts depending what you need a battery for you can make a pack with some battery bars and a soldering iron. You can get higher voltages with a different battery chemistry. It really depnds on what you are doing. Nickle metal and Lipo and LiFe batteries have other advantages if weight,space and run time are a concern. But they add cost you need a special charger for them and Lipo's can be dangerous if you don't have the proper equipment and know how. You can make the pack to tailor your needs. A parallel wired pack will give you a low voltage and a longer amount of time before a recharge . Wired in series will up the voltage but you may need higher capacity cells to get the same amount of time before a recharge. Knowing what your project draws in amps or Milli-amps would help.

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LX2429&P=7 battery bars

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXFD66&P=7 1.2 volt rechargeable AAA

[MoparWoman Jamie]

Here is all I am going to reveal about a project, "2.2Amps (2200milliamps) and around anywhere around 9-12 volts."

Now, for you all that knows this kind of stuff. Maybe you can help me out alittle more on this.

Say I have a 2Amp system 12 volt, now I have a 1Amp switch, I am thinking that switch will be history. Now say I got a 2Amp main switch, would it work if I Y off the wires coming from it to say a different 1Amp switch for there say own thing? Not all of the things will be running at one time on the project. Man I feel like I am designing a dang house here. LOL and almost needing a dang a fuse box. LOL

Hey come to think about it, that does give me an idea... um..

[ChrisPflug]

Amperage at different points in the circuit will depend on how you wire the circuit and, of course, the type of circuit

Sounds like a lot of juice unless you're just running it for a short period of time or it only draws that amperage part of the time

[mredzadventure]

2 amps isn't to bad I would wire the project with some good 12 gauge wire like this http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXKX17&P=ML so volts should not be an issue.

Go with a 3 amp 12 volt switch or larger that would cover the bases on for everything. Try to keep the connections to as few as possible http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXKX39&P=ML

these here are a zero loss connector. If you are running an electric motor of any kind amp draw would be a larger concern.

[MoparWoman Jamie]

2 amps isn't to bad I would wire the project with some good 12 gauge wire like this http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXKX17&P=ML so volts should not be an issue.

Go with a 3 amp 12 volt switch or larger that would cover the bases on for everything. Try to keep the connections to as few as possible http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXKX39&P=ML

these here are a zero loss connector. If you are running an electric motor of any kind amp draw would be a larger concern.

Well so far you guys have been way more helpful then anything.

I am getting ready to work on a big project for a friend, but the issue I am running into is the Amps and volts with the switches. The plans right now is that this project will have more then just 1 to 3 switches operating it on and off the base it will have as well. But the thing is not everything will be on at one time mostly is all, that is where the switches comes into play at. I am designing the system to have a master switch that will feed the other switches. But getting everything to work with each other is what I am working on right now though.

[MikeMc]

My question is what is the type of load you need 12v @2amp for ?

In a typical camera powered by 2 aa batteries the flash circuit draws 2,2 amps and charges the main capacitor to 750 volts. This is done thru a simple transformer circuit. To give a good answer we need real facts, not "clues". Unless you need a motor you should be able to power things up with a small battery...3 volt lithiums come to mind.

[MoparWoman Jamie]

My question is what is the type of load you need 12v @2amp for ?

In a typical camera powered by 2 aa batteries the flash circuit draws 2,2 amps and charges the main capacitor to 750 volts. This is done thru a simple transformer circuit. To give a good answer we need real facts, not "clues". Unless you need a motor you should be able to power things up with a small battery...3 volt lithiums come to mind.

Please don't worry about what I am planing to power, all I needed was info on battery's.. to figure an issue I had out.

What I will be powering will need more then just 3 volts, 3 volts wouldn't even do a thing for the project. Only and mostly a 2amp 9-12 volt will do the job.

Edited November 22, 2010 by m0parman

[MikeMc]

Please don't worry about what I am planing to power, all I needed was info on battery's.. to figure an issue I had out.

What I will be powering will need more then just 3 volts, 3 volts wouldn't even do a thing for the project. Only and mostly a 2amp 9-12 volt will do the job.

I would use a 3 v lithium hi draw with a small transformer and capacitor.Switch before the load with a transistor to power on /off

.....I'm not gonna worry.....just trying to help :D

[MoparWoman Jamie]

I would use a 3 v lithium hi draw with a small transformer and capacitor.Switch before the load with a transistor to power on /off

.....I'm not gonna worry.....just trying to help

First off I'm sorry if I sounded alittle rude before or like if I was snapping at you bud. I wasn't, I just been going at numbers for battery's and working on this system design is all and working between two systems set ups for one project is all.. and only have afew more days to have it finish up. But with what you just said about a small transformer, you kinda gave me an idea that I wasn't really thinking about or in at all. I'm going to see if I can find a switch that works with 2amps but yet converts the amps down to 1amp on the other side of it though. I know you was only trying to help me before, thanks again for the help so far.

[MikeMc]

No problem Jim......let us see it when your done !! ;)

[MoparWoman Jamie]

No problem Jim......let us see it when your done !!

You guys will get to see it, I just don't know when though, but when I get it all done, I'll post it up so you all can see it.

But just so you all know, when time comes and I do post photos of the project, you all might think I am alittle

[envious8420]

You guys will get to see it, I just don't know when though, but when I get it all done, I'll post it up so you all can see it.

But just so you all know, when time comes and I do post photos of the project, you all might think I am alittle

too late

[MoparWoman Jamie]

too late

Thanks.. I think

I just got done doing a 4 days worth system semantics wiring design.. and let me just say was it ever so much fun with what went where and to what

[SSNJim]

Google and Wikipedia are your friends: http://en.wikipedia.org/wiki/Aa_battery That should be a good starting point; be sure to check out the links, too.

[Art Anderson]

If you connected them in series then yes, 2 AA's would be 3 volts, but if you wired them in parallel, you'd still have 1.5 volts, but double the run time.

Wiring in series multiplies the voltage available by the number of cells, wiring in parallel multiplies the amperage by the number of cells--from my 7th Grade Electrical Shop Class back in 1956.

Art