using a starter battery and a deep cycle battery in a vehicle
i may sound a little over ambitious in this project but i think it can be done i want to put a stater battery in my truck and keep it independent from the rest of the electrical system while the vehicle is off and only have it connected to the starter. then i would like to have a deep cycle battery connected to the lights, radio ect so i can power the radio and sub with the vehicle off but when the vehicle is running both batteries need to charge and be connected to the alternator. I have some knowledge about electrical components and any ideas would be appreciated. thanks.