The Harloff Basic Battery Backup Unit for M-Series (SKU: BBU-BASIC) is an essential power resilience accessory designed to provide uninterrupted electrical backup for electronic locking systems and powered peripherals on Harloff M-Series medical carts. Engineered specifically to integrate into M-Series cart frames, this field-installable battery unit ensures that keyless access keypads, proximity card readers, and auto-locking drawer mechanisms remain fully operational during patient transport or power outages. By maintaining continuous power to cart security components, the BBU-BASIC protects controlled substances, emergency medications, and clinical supplies from unauthorized access while preventing lockouts during critical patient care workflows across emergency rooms, intensive care units, and surgical centers.