[Elecraft] AA primary cell (K1 related) capacity

[Tom Hammond NØSS]

Check out:

    http://www.mrnicd-ehyostco.com/

for 2000mAH AA NiMH cells and they have a new charger, too!

    http://www.mrnicd-ehyostco.com/new_page_2.htm



At 09:30 AM 6/19/02, Don Brown wrote:
>Hi
>
>Yes you are correct about alkaline batteries and high currents. Here is a 
>site that goes into great detail on the testing of batteries in high 
>current demand applications. Note how the alkaline batteries compare to 
>the NiMh.
>
>http://www.imaging-resource.com/ACCS/BATTS/BATTS.HTM
>
>The performance of NiMh batteries is also very dependant on the charger 
>used. The Maha c204f is the one I use and it works very well although it 
>will only charge 4 at a time in about 3 hours. At only $23 each you could 
>buy two. The ultimate is the Maha MH-C777+ this charger will charge just 
>about any battery pack up to 12 cells NiCad NiMh NiLion.
>
>http://www.mahapowerex.com/maha-mh-c204f.htm
>http://www.mahapowerex.com/mh-c777plus.htm
>
>Don Brown
>KD5NDB
>----- Original Message -----
>From: Mark J. Dulcey
>Sent: Wednesday, June 19, 2002 7:49 AM
>To: Steve Jackson
>Cc: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] AA primary cell (K1 related) capacity
>
>Steve Jackson wrote:
> > Does anyone know what a modern alkaline AA-size primary cell is rated for,
> > in Ampere-hours?  Ttrying to do some back-of-an-envelope comparisons 
> between
> > 1800 mAh NiMH cells and Duracell/Energizer class cells.
>
>One site I checked claimed 2800 mAh. Other sites seem to give numbers in
>the same neighborhood.
>
>However, alkaline batteries aren't nearly as good at handling high
>current rates as NiCd or NiMH, so the capacity drops faster at high
>discharge rates. Here's a page with a link to a chart that shows the
>effect: http://www.greenbatteries.com/documents/Battery_FAQ.htm  The net
>result is that an alkaline pack would probably outlast a good NiMH pack
>by about 50% in receive-only use, but might actually last LESS time if
>used for a session that included a lot of transmitting.
>
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