[shortdesc]48 Vdc / 864 VAh Lead-Acid, 2U Rack/Tower, External Battery Pack for Smart-UPS, Replacement Battery APCRBC115 (RBC Qty: 2)[/shortdesc] [properties] Brand APC by Schneider Electric Model SMX48RMBP2U Product Type Smart-UPS X External Battery Pack Form Factor Rack/Tower 2U Dimensions (H x W x D) 3.5" x 17.008" x 19.3" (8.9 x 43.2 x 49 cm) Weight 63.14 lb (28.64 kg) Color Black Number of Rack Units 2U Mounting Mode Rack-mounted Cooling Not specified [/properties] [specifications] Battery Type Lead-Acid Battery Voltage 48 V Device Mounting Enclosed battery cartridge RBC Quantity 2 Replacement Battery APCRBC115 Included Battery Modules 0 (empty) Operating Temperature 0–40 °C (32–104 °F) Storage Temperature -15–45 °C (5–113 °F) Operating Humidity 0–95% non-condensing Storage Humidity 0–95% non-condensing Operating Altitude 0–10,000 ft Storage Altitude 0–50,000 ft Compliance RoHS, REACh, WEEE Warranty 2 years repair or replace Warranty 2 years repair or replace [/specifications] [accessories] Installation Guide Included in the box Rack Mounting Brackets Included in the box Warranty Card Not specified [/accesories] Overview The APC SMX48RMBP2U is a 2U external battery pack engineered to expand backup time for Smart-UPS deployments. With a 48 Vdc, 864 VAh lead-acid design in a compact rack/tower chassis and included rack mounting brackets, it integrates cleanly into standard racks to boost autonomy for servers, storage, and network devices. Key Features & Benefits 48 Vdc Architecture – Matches the UPS battery bus for seamless runtime extension. 2U Rack/Tower Form Factor – Conserves U-space and supports flexible orientation in constrained IT racks. Lead-Acid Chemistry – Proven energy storage for predictable capacity across typical data-room conditions. Serviceable Design – Uses APCRBC115 with RBC quantity of 2 for straightforward maintenance planning. Ready-to-Mount – Ships with installation guide and rack mounting brackets for clean deployment. Technical Deep Dive Battery System: A nominal 48 Vdc, 864 VAh pack built on lead-acid modules aligns with Smart-UPS expectations so the UPS can immediately leverage added capacity during an outage. Mechanical Integration: The 2U enclosure (3.5″ × 17.008″ × 19.3″) and included rack mounting brackets simplify installation while maintaining front-of-rack access. Product weight is 63.14 lb (28.64 kg) for rail-planning and handling. Replaceable Components: Includes zero pre-installed battery modules and uses APCRBC115 (RBC Qty: 2) as the replacement set—useful for lifecycle planning. Ideal Applications Smart-UPS installations requiring extended runtime Racks allocating 2U for external battery capacity IT environments standardizing on 48 Vdc battery packs Frequently Asked Questions (FAQs) Q1: What’s the installation/form factor? A: It is a 2U rack/tower external battery pack; rack mounting brackets and an installation guide are included for fast setup. Q2: How much runtime does it add? A: Runtime extension depends on the UPS model, attached load, and total number of battery packs connected. The pack increases available autonomy by adding 48 Vdc capacity. Q3: Which batteries does it use? A: Replacement battery is APCRBC115 with an RBC quantity of 2; the unit ships with 0 battery modules installed.