Thanks Geoff for the in-depth reply, I will have read it carefully again, I have seen it before about wiring into the ignition but it might be a bit much for me, but I will look it up again and maybe it will make more sense now.

Hi
I was expecting some degradation of the AGM battery because of the mix, but do you think the bongo charging system might get overloaded with the different batteries.
I do fully charge the AGM every now and again separately with an AGM charger to minimise the damage.

Hi all :D
This is my first post and forgive me I have not given the correct terminology or all the info needed but here goes.

I have a CarGo vsr setup with an old sb acid110amp and a new AGM 140amp lb.
After charging by driving or mains, the Red light stays on as if the lb as it now is holding a ...