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SigmasTek  |  SKU: BW-5141

APC SU1400RMXL UPS Compatible Replacement Battery Set 50.64 lb

26% off
New arrival
Sale price $216.99 USD Regular price $292.99
Shipping calculated at checkout.
Includes 4 brand new SigmasTek SP12-18HR batteries (12V 18AH)
High rate discharge design for superior power output
Valve regulated, spill-proof construction for safe operation
Low self-discharge for longer shelf life and reliability
Tested to meet or exceed OEM specs 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.

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 | 18 Ah

Terminal Type

Nut & Bolt

Replacement Battery Set for APC SU1400RMXL - SigmasTek SP12-18HR (4-pack)

Restore full runtime and reliable protection for your APC SU1400RMXL with this brand new replacement UPS battery set. Designed specifically to match the performance needs of the APC SU1400RMXL, this set delivers dependable power, high-rate discharge capability, and factory-fresh reliability. Whether you need to replace aged cells or upgrade your backup system, this high-performance UPS battery set gives you the confidence of tested components that meet or exceed OEM expectations. Please note that you must reuse all existing cables and hardware from your original configuration to install these batteries.

Key Specifications

  • Compatible UPS Model: APC SU1400RMXL
  • Battery Model: SigmasTek SP12-18HR
  • Quantity: 4 batteries (battery set)
  • Voltage: 12 Volts
  • Capacity: 18 AH (amp-hours)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Resistance: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

This replacement UPS battery set is engineered for durability and consistent performance. The high rate discharge design supports short bursts of higher power output—ideal for demanding UPS loads like the APC SU1400RMXL—while the valve regulated, spill-proof construction minimizes maintenance and increases safety. Low self-discharge helps maintain charge between uses, and high vibration resistance improves resilience in rack-mounted or mobile installations. Certified by U.L. and CE, these cells are manufactured to meet strict safety and quality standards.

Expect a long-lasting battery life when installed and maintained according to your UPS manufacturer’s guidelines. These batteries are factory fresh and individually tested by our technical staff to ensure they match or exceed OEM specifications. Use this replacement UPS battery set for a wide range of applications: Uninterruptible Power Supply (UPS) units, emergency power supply systems, and battery-powered tools that require dependable 12V, 18AH capacity. If your APC SU1400RMXL demands reliable backup runtime, this high-performance UPS battery set is an optimal, cost-effective choice.

Installation reminder: reuse your existing cables and hardware from the original configuration. For assistance choosing the right replacement UPS battery or for installation guidance, contact our customer service at or e-mail our support team.

Buy your replacement batteries for the APC SU1400RMXL UPS unit with confidence today! Secure a long-lasting battery solution and get fast shipping on in-stock items—orders typically ship within 24 hours.

Technical Specifications

Voltage12 Volts
Amp Hours18 Ah
Terminal TypeNut & Bolt
Length (in.)7.13
Width (in.)3.0
Height (in.)6.59
Weight (lb.)50.6

Product Highlights

  • Brand Replacement : APC SU1400RMXL
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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