[Elecraft] K2/100 Portable Battery Pak Question

[John R. Lonigro]

Jonathan:
There would be no problem using the 7ah gel cell if you ran the K2 at 5 
Watts.  50 Watts is something else.  First of all, the 7ah rating is 
based on a 20 hour discharge.  This means you will get 7ah out of the 
battery if you draw 350 ma for 20 hours.  But you won't be able to draw 
7 amps for 1 hour.   With the K2, you'd get about 24 hours of 
receive-only with that battery.  And I suspect the K2 running 50 Watts 
will draw a lot more than 7 amps.  At 50 Watts, I'm guessing you might 
be able to do some heavy operating for 2-3 hours before the battery 
bites the dust.  My suggestion would be to stick to 5 Watts, unless a 
desired contact can't hear you, then crank it up as needed.

Good luck and 73's,

John AA0VE

Gottlieb, Jonathan wrote:

>Does anybody have any experience using the HFProjects Power-Pak with a K2/100?  It is a nice 12v 7ah gel cell with built in trickle charger (www.hfprojects.com).  I wouldn't expect it to power the K2/100 at full 100 Watts, but I'm thinking it would be a good way to have a nice power supply for camping or traveling and run the k2/100 at 35-50 watts.  Please let me know if anybody has used this successfully.
>
>Jonathan Gottlieb
>WA3WDK
>k2/100 #4856
>  
>