In normal UPS use, FGET use maintenance-free VRLA battery, whose design life is typically either five or ten years, with some fifteen-year sizes available.
VRLA battery (ValveRegulatedLeadAcidBattery) has a wide range of uses and can be used in power tools, emergency lights, UPS, electric wheelchairs, computers and communication equipment.
Lead carbon batteries provide not only high energy density, but also, high power, rapid charge/discharge and longer cycle lifespans.