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SigmasTek  |  SKU: BW-5028

APC RBC55 High Performance Compatible Replacement Battery Cartridge 50.85 lb

26% off
New arrival
Sale price $351.99 USD Regular price $474.99
Shipping calculated at checkout.
Four 12V 18AH batteries, plug & play ready for APC RBC55 UPS
High rate discharge design for optimal power output
Valve regulated, spill-proof, and maintenance-free
Low self-discharge and high vibration resistance for longevity
U.L. Recognized with 1 Year warranty included
In stock

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Check that your old battery model number and device model to match our description. This makes sure they work together.


We ship your order same day if you buy it before 4 PM EST.

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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.


Volts & Amps

24 Volts | 18 Ah

Terminal Type

Special Connector

Compatible Replacement Battery Cartridge for APC RBC55

When your APC RBC55 needs replacement power, choose a compatible, plug-and-play cartridge designed for performance and reliability. This replacement UPS battery cartridge brings together factory-fresh cells and robust protective features to keep your UPS operating when it matters most. It’s a high-performance UPS battery option tailored for dependable backup in small-to-medium UPS systems.

Key Specifications

  • Configuration: Contains four SigmasTek batteries (12 Volts 18 AH each)
  • Brand: SigmasTek
  • Combined listing in product text: SigmasTek 24 Volts 18 Ah (as provided)
  • Connector / Terminal: Special Connector (assembled with wire harnesses, connecting plates and terminal covers)
  • Plug & Play: Batteries pre-assembled and ready to use
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof
  • Features: Low Self-discharge, High Vibration Resistance
  • Safety: U.L. Recognized
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible Model: APC RBC55

Benefits

  • Durability: Built to withstand typical UPS installation stresses with valve-regulated construction and vibration resistance, ensuring long-term mechanical and chemical stability.
  • Long life and reliability: Low self-discharge chemistry and factory testing provide a long-lasting battery that holds charge and is ready for service after storage, representing a dependable long-lasting battery option.
  • High performance: The high rate discharge design supports elevated power output when the UPS must sustain critical loads during outages, qualifying it as a high-performance UPS battery for emergency situations.
  • Installation ease: Pre-assembled with wire harnesses, connecting plates, and terminal covers for plug-and-play replacement that reduces downtime and simplifies maintenance procedures.
  • Safety and compliance: U.L. recognized cells add confidence for deployment in mission-critical environments and commercial installations.
  • Typical applications: Perfect for UPS units using the APC RBC55 cartridge, emergency power supplies, telecom and networking closets, and battery-powered tools that may require short-term high power.

Upgrade your APC RBC55 with this compatible replacement UPS battery cartridge to restore dependable backup power. Orders generally ship within 24 hours — purchase now to ensure continued protection of your critical systems.

Technical Specifications

Voltage24 Volts
Amp Hours18 Ah
Terminal TypeSpecial Connector
Length (in.)7.13
Width (in.)6.0
Height (in.)6.59
Weight (lb.)50.8

Product Highlights

  • Brand Replacement : APC RBC55
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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