[Elecraft] K2 Internal Battery Voltage

[Guy Olinger K2AV]

I think you have one cell in the battery that has gone shorted.  Hard
charge on a 6 cell is 14.4.  5/6 of that is 12.  12.1 volts is what
you get when a charger expecting to charge something at 13.8 to 14.2
is put across 5 cells instead of 6.

On discharge a normal fully charged battery will near instantly drop
to 12.8 and then quickly ease down to about 12.2 where it finds the
main discharge plateau.  5/6 of 12.2 is 10.2

So you have one cell shorted, and however much way-over-charging was
happening to the other five has started to make them resistive.

Time to replace and recycle.

73, Guy.

On Wed, Jun 15, 2011 at 6:49 PM, Alan D. Wilcox
<alan at wilcoxengineering.com> wrote:
> Dick,
> Either the battery wasn't being charged properly or it's old and not
> holding a charge.
> How old IS the battery?
> Cheers, Alan
>
> Alan D. Wilcox, W3DVX (K2-5373, K3-40)
> 570-321-1516
> http://WilcoxEngineering.com
> http://eBookEditor.net
> https://www.smashwords.com/books/view/28062?ref=awilcox
> Williamsport, PA 17701
>
>
> On 6/15/11 3:15 PM, RICHARD SCHNEIDER wrote:
>> Insight needed. I noticed my K2's internal battery voltage dropped to below
>> operating range even though the rig was in charging mode while plugged into
>> mains. I assumed the battery had gone bad. Pulled the rig apart and measured
>> voltage while the rig was off. 12.1 VDC. Turned the rig on and measured
>> across the battery. 8.9 VDC. Any ideas where the problem lies?
>>
>> 72, Dick AB0CD..
>>
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