^ its AGS..
no local battery is ever designed for UPS.. for ups, proper batteries are Dry batteries,, again, (none local,proper quality dry batteries are usually imported from china)
number of plates doesnot define it is made for ups or not.. for backup purposes you could even use a small 45AH battery.. or even as small as motorcycle batteries.. they also would provide backup..
number of plates and thickness of plates define 2 seperate things.. more plates means more backup time.. thicker plates mean deeper cycle than thin plates.. more plates means more appliances can be run, or same appliances for longer time when fully charged,,thick plates mean the battery can give more backup while discharging without more damage to the cells compared to thin plates.. they can withstand deeper discharge and return back to full charge state..
in AGS the GX2 series is better equiped to handle our pk power problems with good plates.. volta has IPS series batteries with some good feedback from users here.. they are supposed to be japanese engineered specifically for PK UPS...then the pheonix itslef is a very durable brand..
again.. thick plates for longer battery life, and more plates for extra backup is just the most simplified layman explanation.. 100s of other factors are involved in both of them and there is no single equation to distinguish one battery from other in different comanies
true high Quality batteries are Dry batteries.. all of the batteries we have imported, working in many industries , plazas, banks and even our own homes, have been working 100% from past 3 years and still going strong.with both UPS and Solar panels.
in general both are equally important... more backup time is always preffered.. but durabilty of battery is equally important for extended life . in each company there are specific models where the plates are thickest, after that they increase number of plates and they become thinnest to accommodate the extra plate per cell.. these are the worst batteries.