Hello to the community and respect – is something exotic and OT….. because of the LED Fred`s I thought to myself, I put my question here times. Even if it is not typical of VOLVO. Have after all other knowledge, where electrics stops at the plug and cable…… To the facts: Have in a car 2 batteries installed – front the starter battery and in the boot a 2. Both 12 V 72 AH. The 2 battery serves for the operation of a compressor cooler, lamps, air compressor etc. The batteries are switched in parallel and by a normal switch – no disconnection relay – closed or separated. Speak car off, switch off, batteries separated, cooling box takes only electricity from the rear Bat. When driving both and are charged. Due to this situation the charge differences of both Bat are uneven and the rear is not full, since the controller shuts off at full Bat front. Now I have to fix a Ctek charger for both Bat rear, which is not sufficient to my opinion. My overlay: I build up so half the problem before the charging is necessary? But to separate the charge from the old ones without asking.