Rapierwit wrote:

First real test this weekend on the farm.........

Farm? where are you going? At work
At home

"I can't always believe facts I read on the web" - Charles Dickens

winner by default of the tractor vs caravan race

A friend of mine has a farm in East Sussex...nothing extravagant...100 acres and a lovely river.

Nice and peaceful for the long weekend, a couple of pints and a spot o' fishing.  Freelander 2 TD4 HSE
Silver
Xenons
Lot's of mud!!!!

We want pics of a fl2 covered in mud when you get back otherwise you have to change your forum signature  At work
At home

"I can't always believe facts I read on the web" - Charles Dickens

winner by default of the tractor vs caravan race

Another option is a sealed battery pack, like the one I use to power my astronomy equipment. Here's an example from Amazon, though this is in no way an advertisement for them as you can get these power packs pretty much anywhere:

http://www.amazon.com/Celestron-Power-Tank...amp;sr=8-1

It probably would fit the bill, and could also serve as a jump start for your FL2 battery, should it ever be needed.