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SigmasTek  |  SKU: BW-4535

APC RBC135 UPS High Performance Replacement Battery Set 7.01 lb

21% off
New arrival
Sale price $20.87 USD Regular price $26.36
Shipping calculated at checkout.
Replacement battery set with 2 SigmasTek SP12-5.5HR (12V 5.5AH)
Suitable for UPS, emergency power, and battery-powered tools
Valve regulated, spill-proof with excellent vibration resistance
Low self-discharge ensures long battery life and reliability
Certified and backed by a 1-year warranty
In stock

— Ready to ship immediately


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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.

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


Volts & Amps

12 Volts | 5.5 Ah

Terminal Type

F2

SigmasTek SP12-5.5HR Replacement Battery Set for APC RBC135

Restore runtime and protect critical systems by replacing worn cells in your APC RBC135 with this replacement UPS battery set. The kit includes two SigmasTek SP12-5.5HR batteries (12 Volts, 5.5 AH) specifically supplied to meet UPS requirements. With a focus on compatibility, performance, and reliability, this long-lasting battery set brings your APC UPS back to life so it can continue safeguarding equipment during outages.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-5.5HR
  • Quantity: 2 batteries per set
  • Voltage: 12 Volts
  • Capacity: 5.5 AH
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Feature: Low Self-discharge
  • Feature: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatibility Note: For use in APC RBC135 UPS units — use all existing cables and hardware from original configuration
  • Shipping: In-stock items typically ship within 24 hours

Benefits

This replacement UPS battery offers superior durability and consistent performance for sensitive electronics. The high rate discharge design supplies the necessary power during brief, intensive load events, ensuring a smooth transition when mains power is lost. The valve regulated, spill-proof construction lowers maintenance needs and increases safety for indoor installations. Low self-discharge characteristics keep the batteries ready for service after storage, while high vibration resistance helps them withstand mechanical stresses.

Perfect as a high-performance UPS battery for APC RBC135 units, this set is well-suited for uninterruptible power supplies, emergency power systems, and battery-powered tools. Its factory-fresh condition and certifications (U.L. Recognized and CE Certified) give you confidence in product reliability and compliance. If you want a long-lasting battery that returns your APC UPS to full functionality, this SigmasTek set is an excellent, cost-effective solution.

Need help confirming compatibility or placing an order? Call our knowledgeable staff at or e-mail us. Buy this replacement UPS battery set today to ensure your APC RBC135 continues protecting your critical systems — fast shipping and a 1 year warranty included.

Technical Specifications

Voltage12 Volts
Amp Hours5.5 Ah
Terminal TypeF2
Length (in.)3.54
Width (in.)2.76
Height (in.)3.98
Weight (lb.)7.0

Product Highlights

  • Brand Replacement : APC RBC135
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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