UPC RBC2 Precharged Replacement Battery Pack for BK350 and BK500 Buy only Genuine UPC Products! Products manufactured by UPC says "Ships from and sold by Amazon.com" or Ships from and sold by UPC only! Sealed and leak-proof battery made in America Plug & Play with expected battery life of 3-5-years Emergency power supply for computers, data centers, telecommunication devices and other electrical equipment 2-Year warranty included on all UPC-Branded Products if purchased directly from UPC or Amazon.com