Dual Battery - When
 

Okay this is a quick and dirty Question

When do your really need to go to 2 Battery's

PS - I'm not running a crazy sound system either

You have Air ride don’t you. My buddy had 74 c10 that we put air ride and we killed the battery all the time.

Considering I have a yard full of heavy equipment only using 1 battery and an equal number of full size semi's with only 2 batteries, I think running 2 is more of a cosmetic thing or cover-up for other poor electrical system choices. Running a trunk mounted battery with 4ga will quickly make you think you need 2 batteries, so will running very poor grounds.

High output alternator and a good strong battery is the best way. Alternator is critical.

When you have glow plugs in your diesel:yes:

I was thinking of doing this to power the A/V and sound systems so that the kids could play games or watch movies while at shows and I wouldn't run down the primary battery. Good/bad idea?

In this situation I think it's a good idea.:thumbsup: