[Elecraft] Re: AA primary cells: NiMH vs. Alkaline

[Phil Wheeler]

Wayne Burdick wrote:

>Phil Wheeler wrote:
>
>>Also, aside from the cost, would Lithium AAs work well for this
>>application?  The thrust of the question is there are situations (e.g.,
>>backpacking) where the weight savings and the low-temp characterisitics
>>of Li cells can make them worth the cost.
>>
>
>The weight saved by using Lithiums would be at most a couple of ounces.
>Since the rig, antenna, key, log, and batteries weigh upwards of 32
>ounces, this probably isn't a good tradeoff.
>

Well, it all adds up, Wayne. Likely, it depends on how many batteries 
you want to carry for rig, digicam, etc.  I just ran some measurements 
on sets of four AA cells.  Results:

o Alk    -- 3.2 oz
o NiMH - 3.6 oz
o Lith    -- 2.0 oz

So assuming that the Li cells gave the same life as the NiMH (an 
assumption, at this point) and I wanted to carry two sets of 10 cells 
each, the wt difference would be 5x1.6  or close to half a pound.

OTOH -- if that much wt savings is critical, I guess I wouldn't carry a 
rig anyway <grin>

73, Phil


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