Posted by MartyC on March 20, 19100 at 07:50:15:
In Reply to: Re: Dual Batteries posted by Darrell on March 20, 19100 at 07:14:44:
: I've got a 1999 GMC 1500 4x4. It has the driver side battery tray already installed and sitting there just begging to be filled. I thought I may add a 2nd battery just because I like having neat/more stuff.
: Seriously, if I ever moved to a really cold weather climate, then the 2nd battery idea might be worthwhile.
: Does anyone know if it's easy as just putting the battery in along with a couple of cables, and running the batteries in parallel. Or is there more to it that I just don't realize.
YES, there is more to it than that. Simply wiring in parallel will drain both batteries. Then you won't have a spare to start the truck and will need a jump. Use a quality setup with an isolator; several on the market. Here's one: