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.
FGET BATTERY - The Most Trusted And Highest Reviewed Sealed Lead Acid Batteries BATTERY TYPE - 12 Volt 12 Amp 20 Hour Sealed Lead Acid Battery With F2 Style Terminals
AGM Small Battery 12v 12ah Deep Cycle Storage Batteries 12 ah