Upgrading MK2 Renault Clio Battery

Hi All,



wanted to clarify/understand a few things.



I have recently had my car serviced and the mechanic said to me that I should change my car battery as the one I have currently isn't sufficient to power my 600w amp and have AC on at the same time.



The battery currently is



063

340 CCA



I know how to convert the amp output into wattage to understand what sort of battery I may need but I wanted to understand two things.



1.

If I upgrade my battery, will it affect my alternator. I.e will I need a more powerful one.



2.



http://ift.tt/1taGiSb



is this sufficient?





thank you :)