dh-t
Member
Can anyone help me ,I own an ex police Range Rover 4.0 litre County ,in the boot there is a second battery compartment (black box) inside are +/- leads,my question is ,does anyone know if the battery was used purely to power all the extra equipment,or did it run in tandem with the primary battery up front. Also how was this second battery charged.Is it worth me installing a backup battery to be used if I get a flat battery would this battery hold a full charge . Any help would be greatly appreciated .