histic , 7 days ago You don't want to fully drain the main battery as it would do severe damage to it and most of the 12v system has a phantom draw of power so to keep the main battery from running out they have a separate one
You don't want to fully drain the main battery as it would do severe damage to it and most of the 12v system has a phantom draw of power so to keep the main battery from running out they have a separate one