guys just had a new sound system installed in ma civic. its crazy, so loud, screens and all... was at the river lasnight watching dvd and decided oh maybe i should turn the car on and give the battery a bit of a charge.

well the battery was flat and the car wouldnt start. long story short me and mates push started it...

enough about that what my question is- I want to now invest in an accessaries(spelling) battery so it runs all ma sound system... will this mean i need to re wire the power lines for the amps etc to the acessary battery or can i leave everything as is when batteries are connected up?

anyone with info about how accessory batteries work let me know

cheers