On Mon,8/10/2015 3:45 AM, David Bondy G4NRT wrote:
So, I am looking for advice on a portable power solution.  Should I bee looking 
at LiFePO4 batteries

Yes.

or Sealed Lead-Acid batteries?

No.

What are the pros and cons of each?

LiFePO4 gives more than double the Ah capacity for their weight, AND a far better discharge curve (that is, the battery voltage stays higher until it runs down). They are also a lot more expensive, but some battery vendors are a lot more expensive than others for the same product.

How about charging them when they are not in use?  Should they be left to run 
down and then charged or kept continuously on a charger?

They should be charged using a proper charge controller.

Are the Buddipole one any good

Buddipole is one of those too expensive vendors of LiFePO4 batteries. The good vendors in North America are http://www.bioennopower.com/collections/12v-series-lifepo4-batteries and http://www.batteryspace.com/128vlifepo4batterypacks.aspx I bought a BLF-1220W from Bioenno. My neighbor bought a similar pack from Battery Space.

UN 38.3 is a safety Standard for Li batteries, and is required for air transport of batteries.

(although I would have to source the same type here as they are not shippable 
across the pond!).

I suggest that you send email to those two good vendors and ask for suggestions about how to buy in the UK.

73, Jim K9YC
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