http://hf-ssb-transceiver.at-communication.com/en/at/at_portable_power_pack.html
Just spotted this one the net
bring a friend to wind up the power if required
and a solar panel too 
see no price thou
Karl
Hi Carl,
Good for those who forget to charge their batteries before an activation. Weight is 2.6 kg so that might be an issue for a 8 to 10 AH system. Can you key the laser?
73
Ron VK3AFW