The PBB2S-13-3.5-WMBB-K includes the PBB2S-13-3.5 PSU and the WMBB enclosure. Accepts Batteries 7AH to 17AH (Not included) The PBB2S1335 is a 13.8Vdc, 3.5A off-line battery charger / DC uninterrupted power supply which operate from 100-240Vac mains power. When connected to a valve regulated lead-acid (VRLA) battery, these units provide uninterrupted power to a DC load in the event of mains failure. The PBB2S Series contains a two-step current limited float charger, output over-current and short circuit protection, a self-resetting battery fuse, over-temperature protection, and mains DC OK battery OK and battery fuse fail alarms. The PBB2S is available in a light weight corrosion resistant aluminium chassis mount enclosure. - 12VDC 3.5A power supply for battery backup. - High reliability and high efficiency. - Industrial-grade switching power converter. - Light weight corrosion resistant aluminium enclosure. - Output over current and short circuit protection. - Separate current-limited battery charging output. - Output over voltage protection. - Self-resetting battery fuse. - Over temperature protection. - Mains OK / DC OK - Green LED and alarm contact. - Green Battery OK - Green LED and alarm contact. - Battery Fuse Fail - Red LED. - Dimensions 219 (L) x 114 (W) x 62 mm (D).