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SigmasTek  |  SKU: BW-4649

APC Smart-UPS X 120V External Battery Pack Rack/Tower (SMX120RMBP2U) UPS High Performance Replacement Battery Set 35.03 lb

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New arrival
Sale price $189.99 USD Regular price $237.99
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Includes 10 SigmasTek SP12-5.5HR batteries, 12V 5.5 AH each
High rate discharge for UPS units requiring short bursts of power
Valve regulated and spill-proof for maintenance-free use
Low self-discharge and vibration resistant for extended life
U.L. recognized, CE certified with 1-year warranty
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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Volts & Amps

12 Volts | 5.5 Ah

Terminal Type

F2

Replacement Battery Set for APC Smart-UPS X 120V External Battery Pack Rack/Tower (SMX120RMBP2U) - SigmasTek SP12-5.5HR (10-Pack)

For the APC Smart-UPS X 120V External Battery Pack (SMX120RMBP2U), this replacement UPS battery set provides dependable, factory-fresh power to restore and extend runtime. Containing ten SigmasTek SP12-5.5HR batteries, each rated at 12 Volts and 5.5 Ah, this kit is tailored to meet the higher-rate discharge demands of external UPS battery packs. If you require a high-performance UPS battery solution that balances safety, endurance, and OEM-level performance, this set is an excellent match.

Key Specifications

  • Compatible UPS Model: APC Smart-UPS X 120V External Battery Pack Rack/Tower (SMX120RMBP2U)
  • Quantity: 10 SigmasTek SP12-5.5HR batteries
  • Voltage: 12 Volts
  • Capacity: 5.5 Ah
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Performance Features: Low Self-discharge; High Vibration Resistance; Superior Performance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Installation Note: Use all existing cables and hardware from your original configuration to connect the new UPS batteries
  • Typical Applications: Uninterruptible Power Supply (UPS) Units; Emergency Power Supply; Battery Powered Tools

Benefits

These batteries are engineered for tough, real-world UPS applications. The high rate discharge design supplies short-duration, high-current output essential for external battery packs and high-demand loads. Valve regulated and spill-proof construction reduce maintenance and enhance safety within rack and tower environments. Low self-discharge ensures batteries retain charge during storage and deployment cycles, giving you a reliable, long-lasting battery solution when replacing the SMX120RMBP2U pack.

High vibration resistance improves resilience in densely packed data center racks or mobile deployments, while UL and CE recognition confirms compliance with recognized safety standards. The result is a replacement UPS battery pack that supports consistent, predictable performance across emergency power systems, UPS units, and battery-operated tools. Each SigmasTek cell arrives factory fresh and tested to meet or exceed OEM expectations for performance and longevity.

Choose this high-performance UPS battery set to restore runtime, reduce unplanned downtime, and extend the service life of your APC Smart-UPS X external battery pack. It’s a practical, cost-effective way to maintain mission-critical power protection.

Get your replacement UPS battery set for the SMX120RMBP2U today—order now for fast shipping, a 1 year warranty, and a dependable long-lasting battery solution for your critical systems.

Technical Specifications

Voltage12 Volts
Amp Hours5.5 Ah
Terminal TypeF2
Length (in.)3.54
Width (in.)2.76
Height (in.)3.98
Weight (lb.)35.0

Product Highlights

  • Brand Replacement : APC Smart-UPS
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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