[Elecraft] Looking for a good battery/charging system for K1

[Paul Christensen]

> Before you reach a decision on battery packs, be sure to read Wayne's Tech 
> Note at
> http://www.elecraft.com/TechNotes/k1_battery_op.htm

That's a good summary of power supply optimization for the K1.  According to 
Wayne's Note, the most efficient use of battery voltage becomes a function 
of one's output power target value - ranging from near 14VDC for full-rated 
K1 output to a bit less than 10VDC for about 3 watts.

Depending on the discharge characteristics of the battery, I imagine most K1 
users would be quite happy starting at a commonly available 12V and allowing 
it to drop down to about 9VDC at the end of portable operations or before 
connecting a spare battery to continue.

Paul, W9AC