ZXR250C battery

Can anyone tell me what type of battery these things take to save me from having to rip off the fuel tank first to find out? The bike is a 2000 model but Im pretty sure they didnt change at all in the 7 or 8 years.
The manual just states that its a maintenace free battery and it should never be replaced with a conventional battery. Sounds like a load of shite to me...
After a bit of hardcore googling it looks like it is probably a Yuasa YB9L-A2, but if anyone out there has a ZXR250/ZX2R and feels like confirming this for me it would be greatly appreciated.
The bike has an autowatch alarm which probably doesnt help the battery much, but after a 2 hour ride the frieking thing still wouldnt start again the next morning, so it looks like the battery is toast.
Cheers guys,
The manual just states that its a maintenace free battery and it should never be replaced with a conventional battery. Sounds like a load of shite to me...

After a bit of hardcore googling it looks like it is probably a Yuasa YB9L-A2, but if anyone out there has a ZXR250/ZX2R and feels like confirming this for me it would be greatly appreciated.
The bike has an autowatch alarm which probably doesnt help the battery much, but after a 2 hour ride the frieking thing still wouldnt start again the next morning, so it looks like the battery is toast.
Cheers guys,