Exide is a brand offering inverter / backup power batteries (for home / office) — these are essentially lead-acid tubular batteries designed for inverter / home backup usage. For example: Their website says they manufacture “Inverter Battery Range” covering Home InvaTubular, Home InvaMaster, Home InvaMagic etc. Examples: 150 Ah, 200 Ah tubular type batteries listed under their inverter battery category. So these are the “battery” part of the inverter system — you still need the inverter (or UPS) plus wiring/installation. The battery capacity, warranty, technology determine how well it will perform during outages.