[Elecraft] Internal Battery Charging Question

[Dave Gingrich K9DC]

Your supply sounds just about perfect. 13.8 to 14.2 indicated on the K2 
display is what you need to keep the gel-cell charged properly (mine 
sits at 13.9). Lower or higher that will dramatically shorten the life 
of the battery.

See the article...

http://www.elecraft.com/TechNotes/CareandFeedingofBatteries_aa4pb.pdf

On Sunday, Jan 5, 2003, at 15:58 America/Indianapolis, Tom wrote:

>   I am using a regulated power supply which I picked up from Radio 
> Shack
> about ten years ago.  The front panel says it is a 12 volt supply (I 
> think I
> recall it being a 3 amp supply).
>
>   When I put a DMM on the terminals of the power supply (with no load) 
> I get
> a reading of 14.7 volts.
>
>   When I connect the power supply to the K2 and press display on the 
> K2, the
> voltage on the K2 display shows 14.0 volts with 280 ma of current (in
> receive).
>
>   When I remove the power supply and press display, the K2 shows 13.1 
> volts
> (the current is slightly higher  in the 280 to 300 ma range).
>
>   I guess I am asking is that I shouldn't  expect to get more than 13.1
> volts out of the battery (right?), but is the 14.0 (or 14.7) volts too 
> high
> and might I cause damage to the battery?

===========================
Dave Gingrich, K9DC
Indianapolis, Indiana USA
Dave@dcg.us
===========================