low long will this rig last on 850 va battery

[aarnav]

the battery is 850 va 12v/8.5 ah


rig is

a 10 6800k
gtx 760 msi 2 gb
4 gb ram 1866 mhz
cooler master hyper evo 212
corsair cx 500
1 tb hdd 7200 rpm
ALL HELP APPRECIATED

 

[Brantyn Gerik]

no more than 2 hours while gaming, up to 6 idle