[Elecraft] Extremely light KX1 portable external power supply

[Rick Hampton]

Duracell doesn't say, but you can find the discharge curves at
http://www.duracell.com/oem/primary/lithium/px28l.asp

Rick, WD8KEL

Phil Wheeler wrote:

> Bruce Prior wrote:
>
> > I was rooting around a local drug store last night and discovered a
> > new way to provide the KX1 with an extremely light portable external
> > power supply.  I spied a 6 V Duracell� 28L lithium battery.  I found
> > that each 28L is half the length of an AA cell and very slightly
> > smaller in diameter.  I trundled over to a RadioShack and found a
> > single-cell AA holder (RadioShack #270-401A).  Back in the drug store,
> > I bought two of the 28L cylinders.  They're not cheap:  I had to pay
> > $8.99 apiece.  I loaded the single holder with both 28L batteries in
> > series.  Since their diameters are just a shade smaller than AA cells,
> > I inserted a single layer of the strong fiber paper used for a credit
> > card holder.  (I've forgotton the proper name of the stuff:  it's also
> > used for Priority and Express Mail envelopes.)  Now the two 28L's are
> > nice and snug.  The output voltage measures 12.55 Vdc;  the KX1 showed
> > slightly less than 12 Vdc on its internal voltmeter.  I've forgotten
> > the exact figure, and my KX1 is out of my hands for a week or so.
>
> What is the mA-H rating of that battery, Bruce?
>
> Phil