Re: How much current does a flashlight battery offer?
From: Dr. Neutron (neutron_at_aol.com)
Date: 09/04/04
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Date: Fri, 03 Sep 2004 21:40:23 -0700
On Fri, 03 Sep 2004 02:39:41 GMT, "James Sweet" <jamessweet@hotmail.com> wrote:
>
>"wylbur37" <wylbur37nospam@yahoo.com> wrote in message
>news:8028c236.0409020128.29791983@posting.google.com...
>> For the typical flashlight battery (AAA, AA, C, D),
>> all of them are 1.5 volts, but how much current do they offer?
>> (I'm guessing it's around 100 to 150mA, and it varies according
>> to the type of load that's on it).
>>
>> And does it differ according to the battery size?
>> (does a "D" cell offer more current than an "AA"?)
>> or is it just that the D lasts longer?
>
>Batteries are rated in amp-hours, which is the amount of current that can be
>supplied for an hour (within a certain range). Even the lowly AA alkaline
>can probably supply over an amp for brief periods,
At the Energizer web site I referenced in another post, they say that the internal
resistance of a fresh alkaline AA cell is .146 ohms. When I short a fresh alkaline AA
cell with my 50 amp meter, I get 11 amps, just about what you get when you divide 1.5
volts by .146 ohms.
a D will be capable of
>much more. When you get talking rechargeables some of them can supply tens
>of amps.
>
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