Dual Batteries

[Macrobb]

It's not all about cell voltage, it's also about the internal resistance of the battery. This internal resistance increases as the battery ages. So when you ask the battery for high output, the older battery will have a higher internal resistance, so it contributes less when paired to a better battery with less usage cycles on it.

I have no disagreement with this statement.

A battery doesn't have to be "shot" to lag behind and drag down and hinder the performance of a good battery.

Not helping is not the same as hindering. I'm saying what you said above. You may not get peak performance, but you'll get somewhere between the best battery's performance and 2x that depending on how much the worse battery can supply.
It's still not going to be /less/ than the best battery by itself, without a shorted cell.

 

[WVAiredales]

Autocraft gold or duralast gold? Both are 65 with 850 cold cranking amps

Thank you
Shawn

 

[79jasper]

Only good thing about the duralast gold is the longer warranty and prorate.


Sent from my SAMSUNG-SM-G935A using Tapatalk

 

[WVAiredales]

I like what I read about the agm batteries but right now they are out of my budget.

 

[franklin2]

Two batteries from Walmart have been in my truck for several years now. Doing good.