Do You Have To Replace Both Batteries On A Diesel

Do You Have To Replace Both Batteries On A Diesel. Especially in a cold climate. The engine has a very high compression.

And if its more than a few months old it is weak. How long does a diesel car battery last. This was my decision process and how I came to the conclusion.

We recommend changing the battery in Fords every 4 years.

Especially in a cold climate. Remove the bolt and completely clean. Medium dutyover the road semi trucks use a 24V system primarily for starting. This was my decision process and how I came to the conclusion.