OMRON BYB50S is the genuine OMRON replacement battery pack for the BY35S, BY50S UPS. It uses sealed lead-acid (VRLA) cells (7.2Ah/12V×1) and is non-spillable, so it ships by air as non-restricted cargo.UPS batteries wear out after a few years. When your BY35S shows a battery-replacement alarm or runtime drops, a genuine BYB50S pack restores the original backup time. Not sure which pack fits? Check our UPS battery cross-reference or send us your UPS model.Quick facts for international buyers Model BYB50S Fits UPS models BY35S, BY50S Battery type & shipping Sealed lead-acid (VRLA), non-spillable. Ships by air as “not restricted” under IATA Special Provision A67 (terminals protected, marked NON-SPILLABLE). Genuine part Genuine OMRON replacement pack (not a third-party re-cell). Market Genuine new product for the Japanese market. Manuals and labels are in Japanese. Need help? See the OMRON / Mitsubishi UPS battery cross-reference, or contact us with your UPS model and country and we will confirm compatibility before you order. Manufacturer specifications Battery type Sealed lead-acid (VRLA) (long life type) Voltage DC12V Capacity / voltage × quantity 7.2Ah/12V×1 Charging time 12 hours Ambient temperature 0℃~40℃ Ambient humidity 25%~85%RH Storage ambient temperature -15°C to 50°C *Store with the battery fully charged Storage ambient humidity 10%~90%RH Storage period 6 months (when storage temperature is 25°C or less) * Store with the battery fully charged. External dimensions (mm) Width 66 x Depth 153 x Height 104 Weight About 2.5kg Included accessories 1 instruction manual Outer dimensions of packing box (mm) Width 168 x Depth 226 x Height 140 Tolerance ±10mm Packing weight About 2.7kg