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Old 13th Jan 2007, 04:17   #1
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How many amps does an AA put out?

I had an idea for a future project (and hopefully the start of a company ) to have some LEDs run off a couple of AA batteries, but I need to know:

How many amps does a single AA battery put out?
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Old 13th Jan 2007, 04:31   #2
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I looked around, and the consensus seems to be 2400mA for most AA batteries. Energizer claims a peak of 2700 on theirs.
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Old 13th Jan 2007, 04:40   #3
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Wow, thanks for the quick reply!

Once quick other question, how many amps is 2400mA?
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Old 13th Jan 2007, 04:46   #4
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2.4 amps, but good look getting that for long from a AA battery.
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Old 13th Jan 2007, 04:57   #5
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Quote:
Originally Posted by Snafu-X-
2.4 amps, but good look getting that for long from a AA battery.
That's what I feared.. well, the lovable molex will come into play then
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Old 13th Jan 2007, 07:00   #6
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Quote:
Originally Posted by Snafu-X-
2.4 amps, but good look getting that for long from a AA battery.
If it's 2400mAh, then you would get 2400 mA for one hour. I'm not sure if mAh ratings take into account the voltage drop of the battery over time, etc.
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Old 13th Jan 2007, 09:13   #7
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theres no way you get 2.4 amps from a AA battery. you get less from a 9volt when you stick it across your tounge. maybe 2.4 for like milliseconds...
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Old 13th Jan 2007, 10:36   #8
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It's about 2400mAh for an AA, 1200mAh for a AAA and 550mAh for a PP3 battery.

2400mAh means you can draw 2.4A for one hour, 1.2A for two horus, 0.6A for four hours etc...
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Old 13th Jan 2007, 11:37   #9
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1C (that is: theoreticly discharging the battery in 1 hour) is not that high a discharge rate for a battery, even a consumer AA. But you wont get that long out of it, the capacity of a battery is measured at the 20 hour rate and the faster you discharge it the less energy you get out in total.

I have to wonder about your electrical knowledge if you cant convert between mA and A

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Old 13th Jan 2007, 19:18   #10
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Quote:
Originally Posted by jakenbake
theres no way you get 2.4 amps from a AA battery. you get less from a 9volt when you stick it across your tounge. maybe 2.4 for like milliseconds...
well for one, 9v batteries have a high internal resistance, and your saliva isnt that great of a conductor either, not compared to a copper wire. AA NiMH batteries can put out over 20A for short periods (seconds-a minute or two) Ive measured that myself...
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Old 13th Jan 2007, 19:24   #11
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it depends of battery types. alkaline is (if i remember right) 1.5 volts but not much amps (cant remeber how much), while ni-cd\ni-hm only are 1.2 volt but comes in all ranges like 1200 mili-A to energizers 2700 mili-A.
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Old 13th Jan 2007, 20:07   #12
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anyone wanna link a chart giving max current drain for standard cells?

My google fails me.
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Old 13th Jan 2007, 21:44   #13
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Quote:
Originally Posted by ConKbot of Doom
AA NiMH batteries can put out over 20A for short periods (seconds-a minute or two) Ive measured that myself...
well, damn. you learn something new every day.
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Old 30th May 2008, 00:00   #14
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HELP

battery info:
It's about 2400mAh for an AA, 1200mAh for a AAA and 550mAh for a PP3 battery.

question:

The cam uses 9v at 300ma I believe (or so it says).

Which item will last the longest for the cam (generally)?
4 triple A
4 double A
1 9V
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Old 30th May 2008, 00:36   #15
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Quote:
Originally Posted by OtakuHawk View Post
anyone wanna link a chart giving max current drain for standard cells?

My google fails me.
Battery Chart
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Old 30th May 2008, 00:56   #16
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Quote:
Originally Posted by questioner View Post
battery info:
It's about 2400mAh for an AA, 1200mAh for a AAA and 550mAh for a PP3 battery.

question:

The cam uses 9v at 300ma I believe (or so it says).

Which item will last the longest for the cam (generally)?
4 triple A
4 double A
1 9V
The mAh can be thought of as the rate of energy it can provide for you. In the same application, you can eliminate the time component of it, and look at the numbers as energy. 4*2400 >> 550.
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Old 30th May 2008, 01:16   #17
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I thought it was more a case of the amp hours. Could a battery rated 0.79Ah not put out a current of 7.9A for 1 hour?
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Old 30th May 2008, 01:26   #18
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Quote:
Originally Posted by Krikkit View Post
4*2400 >> 550.
But 4*1.5V = 6V (or 4.8V with rechargeables) so 4 AA or AAA cells won't run the 9V cam at all.

Quote:
Could a battery rated 0.79Ah not put out a current of 7.9A for 1 hour?
No. The battery datasheet may show a family of curves for different discharge rates, at the low and high current extremes life will be better and worse than the forecast from the Ah figure.
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Old 30th May 2008, 02:32   #19
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Quote:
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But 4*1.5V = 6V (or 4.8V with rechargeables) so 4 AA or AAA cells won't run the 9V cam at all.
Read the bloody post why don't I?!
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Old 30th May 2008, 03:17   #20
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Quote:
Originally Posted by ConKbot of Doom View Post
AA NiMH batteries can put out over 20A for short periods (seconds-a minute or two) Ive measured that myself...
I'd be fricken amazed if any AA could put out 20a for even one second

Maybe a large battery pack of AA's could output 20a, maybe that's what is meant here
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