Replacement batteries can be purchased for UPS. Replacing the batteries every 3-5 years can extend the lifespan of your UPS. We can advise you on the best battery for your product. We sell a wide range of batteries including: valve regulated lead acid batteries; flooded lead acid batteries; flooded nickel cadmium batteries (NiCd batteries); gas recombination low maintenance NiCd batteries; and lithium ion stationary batteries.