Will adding 2nd battery allow me to run more powerful mono amplifier

[n2audio 5,000+ posts]

The service dept at the local Toyota dealership said the increased current might damage the vehicle electronics.

You would have to be utterly ignorant about anything related to auto electric systems to make a statement like that.

Current is provided on demand by the electrical accessories -- it is not a "force-feed" situation.

The big 3 simply reduces the resistance between components in the electrical system by increasing the cross section of the power and ground wires.

Less resistance means a little less voltage drop and slightly more efficient flow of current.

Hopefully that dealership knows more about their cars' engines and transmissions than they do the fundamentals of their charging systems.

 

[negolien]

Yeah do the big 3 then see where you're at.