Got it at freeway car audio for $399. Got RACV to have a look at it, his opinion is that it's a dud and that I'm gunna need to take it back. Volts drop to around 5V at crank, were it shouldn't drop below 8.
When I say it's got no power, I mean absolutley nothing. I was driving it around at night, I turned my high beams on and my whole instrument cluster just switched off!!! These batteries can stay in storage for 8-12 months without going flat, so I don't think it's just a matter of charging it.
Anyway, I'll try charging it over night, if that doesn't work, there will be heads cracking!!!!!!!!