A dead battery after a couple of weeks could be due to a faulty battery or parasitic draw. Undercarriage washes help remove salt and sand, while spray wax is minimally effective and can smudge glass.

Viewer-submitted questions for The Car Doctor: Q: The battery in my Toyota Tacoma dies periodically. My shop thought it was a parasitic drain, but after testing any drain was gone after 20 minutes.

Q. I have a Toyota Camry with the V6 engine. I have an Interstate battery that is 81 months old. I have recently read your article on the life span of a battery. What brand of battery would you ...

The Car Doctor recommends using a jump-pack as a memory saver when changing a car battery instead of a battery charger. A weak key fob battery can cause issues with restarting a car but should not ...

I have a Nissan Altima 3.5L V6. I have an Interstate battery that is 81 months old. I have recently read your article on the ...