battery help

[super_dave]

i had a question about my system. i want to buy a battery just for my system... im afraid that it will just drain my battery is there anything i could do to fix it so that i only get power when my car turns on? or would i have to hook up my system to the car battery?

[AkimboStylee]

run it to an upgraded altenator, and run a relay to acc so it turns on with the car

[super_dave]

is it hard to do like should i get a professional to do it? or can i do it myself?