Europa-List: Optimum Battery

[david park <dpark748@icloud.com>]

I have had a Odyssey Extreme 15  PC370 fitted for past two years and am 
looking to fit a new battery for the new season of hopefully longer 
European flights this summer.
The alternative Odyssey would seem to be the PC545 or the PC680.
My aircraft is all electric and have had one incident of an indication 
of low voltage indicated by my comms Funkwerk radio.


Does any one with a greater experience of operating the Europa have any 
suggestions for optimum battery?

Regards Dave G-LDVO