[Elecraft] Internal battery for K3/ QRP

[Ignacy]

I think that SLA is too heavy LiFePO4 battery packs are much more efficient
yet have a max voltage around 14.5, within the K3 specs. A 6A pack, e.g, as
in 

http://www.batteryspace.com/12-8v-lifepo4-battery-packs-from-6-6ah-to-9-9ah.aspx

may fit inside the KPA3 space and may be good for a few hrs of operation.
These batteries need a charger with a limit on max voltage and max current,
but a simple voltage regulator + a wart or a laptop PS will do.
Ignacy
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