When I bought my Plus8 it had an Odyssey battery already on it. No date for when fitted in the history file. It started to fail after 9 years. I used a Ctek 3.6 when it was garaged and saw it cycle through the maintenance/charge cycles. Basically park in garage and connect thd Ctek using their connector fitted to the battery.
Over the 9 years only one problem when I left sidelights on when in the garage and not connected for a couple of days. My error. Ctek connected and battery back to good. I had done 45k+ miles on that battery. Started the car quickly every time.
I replaced the failing battery with a new Odyssey. Not the cheapest but I hate battery/starting problems and confidence in Odyssey led to like for like replacement. I remembered to remove the terminal adaptors from the old battery to fit to the new as it came as a bare battery.
I now follow the same Ctek use on the Plus Four. 3 years and 22k+miles. No electrical problems. The only electrical issue was a pcb failure for dash gauges....a badly fitted connector and new pcb fitted under warranty.
