[Elecraft] Powering a K3s from a battery?

[Lynn W. Taylor, WB6UUT]

Once upon a time, car battery manufacturers made 8 volt batteries.  
These were for cars with 6v systems that were aging, and a couple of 
extra volts made up for a lot of problems.

Might take a bit to figure out how to charge them, but a 6v plus an 8v 
battery would give you a really clean supply just over 14 volts.

73 -- Lynn

On 12/29/2015 9:55 AM, Jim Brown wrote:
> Yes, but the battery chemistry also matters. The "normal" operating 
> voltage of LiFePO4 batteries is at least a volt higher than lead-acid, 
> and the discharge curve is flatter. The problem is that LiFePO4 is 
> currently a lot more expensive, and the chemistry requires a special 
> charger.  Prices are gradually dropping, and eventually that's likely 
> where I'll end up.
>
> 73, Jim K9YC