What is the normal voltage it should put out? People with PFC should be able to answer this easily. =)

I might have a dying battery, but I want to make sure. Before the car is on, its about 12V and once the car turns on it gets to about 13.7 - 14.2 V.

I left the sound on for about 5 minutes and i guess it drained the battery which is kinda silly. I had to get it jump started.

So I was just wondering if I need a new battery or not, and if I do, whats the actual size of the battery.

 

i believe that at rest is should be around 12.7V

 

Every time I've done anything electrical that involved getting out the Multi-Meter, I've seen 12.7 with the car off, key in "on" position.

Never checked with car running. I'll take a look tomorrow while I'm out driving. Gotta love the PFC

 

13-14s is fine when driving.

I've recently noticed that my car runs at about 14-14.2 when it's first started and driven in the morning. Later it settles to about 13.6 or so.

 

Yeah, when I first start the car its about, 14.2 but it drops down to like 13.7 once it gets warmed up.

Also, I don't believe 12V is bad.
The thing is, it has a aftermarket stereo and speakers. Would that affect anything?

 

Hey anyone know the size? I might as well just get an optima battery cause I am adding new system to the car anyway.