The price of a 12-volt UPS battery typically ranges from $50 to $200, depending on factors such as battery type (sealed lead-acid or lithium-ion), capacity, and brand. These batteries are commonly used in smaller UPS systems to provide backup power for devices like computers and routers. Brands like APC, CyberPower, and Vertiv offer reliable 12-volt batteries with varying capacities and features, including longer lifespans and enhanced performance. Higher-quality models or those with extended warranties may cost more.