This UPS backup battery replacement is compatible with Eaton’s 9PX5K, 9PX5KP1, 9PX5KP2, 9PX5KTF5, 9PX6K, 9PX6KUS, 9PX6K-10, 9PX6KP1, 9PX6KP2, 9PX6KTF5, 9PX3K3UN, 9PX3K3UNP1, 9PX3K3UNP2 and 9PX3K3UNTF5 UPS systems and 9PXEBM180RT, 9PXEBM180RTUS and 9PXEBM360SP extended battery modules (EBM). Eaton UPS batteries have an expected lifespan of three to five years, so you should take proactive steps to avoid a dead battery and ensure continuous uptime.