Battery question

[bajbass]

Can run a bigger agm dual purpose secondary battery parallel with my optima red top up front without using a isolator i have a 120 amp alternator. https://www.hankook-atlasbx.com/en/product/leisure/agm.do the 100 ah one.

Click to read more...

 

[bajbass]

I also can get another new red top relatively cheap but i heard its not wise to run 2 starting batteries idk...

 

[Popwarhomie 5,000+ posts]

You can run any AGM batteries together.

Optima batteries are garbage BTW. They were good batteries 10 years ago but not anymore. Don't waste your money.

 

[bajbass]

Ok but does it matter to have a deep cycle/dual purpose agm or a start purpose agm as a secondary battery?

 

[Popwarhomie 5,000+ posts]

Ok but does it matter to have a deep cycle/dual purpose agm or a start purpose agm as a secondary battery?

No.