There are various types of batteries such as lead-acid, lithium-ion, nickel-cadmium, and nickel-metal hydride, each suited for different applications. UPS (Uninterruptible Power Supply) systems use these batteries to provide backup power during outages, ensuring continuity for critical systems. Suppliers of batteries and UPS units include major brands like APC by Schneider Electric, Eaton, Vertiv, Luminous, and Exide. These suppliers offer a range of solutions from home inverters to industrial UPS systems with customized capacities and battery types. Reliable suppliers also provide installation, maintenance, and after-sales support services.