OMRON BUM150RC is the external expansion battery unit for the BU150RC UPS. It uses sealed lead-acid (VRLA) cells and is non-spillable, so it ships by air as non-restricted cargo. Connecting it extends the backup runtime of the UPS.Genuine new OMRON part for the Japanese market, shipped from Tokyo by FedEx. Usually ships in 1–3 weeks (back-order from manufacturer).Quick facts for international buyers Model BUM150RC Fits UPS models BU150RC 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). Lead time Usually ships in 1–3 weeks (back-order from manufacturer). 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.