VS Calais wont start

[HOLDENLOVER1998]

today I removed my speakers off my parcel shelf. So Im not running any speakers at the back. After doing this I flicked my accessories on to listen to the radio. I had it on for around 30-45 minutes. Then the accessories loose power. So I turn the accessories off and go to start the car and no luck. The radio works but the car wont start. The car just makes a click sort of noise when i crank it. So i take the battery out and test it with a multimeter. It reads 12.45 volts. What could be the problem. The battery seems to be fully charged when i checked it. I have now put it on a battery charger and the charger says the battery is completely empty. What should I do

 

[Jxfwsf]

Battery should be between 12.5 - 13.5 volts (when not being used).
12.45 volts is flat.

 

[jgtoranalc]

Jump start your car and let it run for few minutes. it will be good after that.

 

[stick3]

check battery water level too if a none sealed type

 

[BlackVXGTS]

You need a new battery. If it's been completely discharged you are unlikely to be able to recover it. How old is the battery?

 

[HOLDENLOVER1998]

Cheers guys for the replies. The battery is now fully charged and I have put it in the car. Worked first turn

 

[Clubby_Don]

Just so people know if u have a 5 or 5.7L you need atleast 13.2 volts to start the bastards lol..
Not even a 700 a/h starter pack would start my old vy ss.. needed to get the 1200 out

 

[HOLDENLOVER1998]

1200 will bearly start a 6L caprice

 

[Jxfwsf]

I've started an ls1 with a 900 amp jumper pack when the car battery was dead flat (it was a cheap chinese pack with a 12V 26ah sla battery)

 

[Clubby_Don]

1200 will bearly start a 6L caprice

1200 is enough.. there is a process you have to follow to jump start any 2006 and onwards holden and if you dont follow it you csnt start the car