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SigmasTek  |  SKU: BW-5133

APC CURK11 UPS Compatible Replacement Battery Set 50.64 lb

17% off
New arrival
Sale price $216.99 USD Regular price $260.99
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Comes with 4 factory fresh SigmasTek SP12-18HR batteries (12V 18AH)
Designed for high rate discharge UPS applications
Valve regulated and spill-proof for safe operation
Low self-discharge maintains battery charge longer
Backed by 1 year warranty and tested for OEM compliance
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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 | 18 Ah

Terminal Type

Nut & Bolt

Replacement Battery Set for APC CURK11 — SigmasTek SP12-18HR (4-Pack)

Maintain peak performance in your APC CURK11 with this comprehensive replacement UPS battery set. Each pack contains four SigmasTek SP12-18HR batteries (12 Volts, 18 AH) formulated for dependable power delivery and tested to match OEM performance. If your CURK11 is showing reduced runtime or the batteries are past their service life, this long-lasting battery set offers a cost-effective way to restore reliable backup power.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-18HR
  • Quantity: 4 batteries (set)
  • Voltage: 12 Volts
  • Capacity: 18 AH (Amp-hours)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof
  • Self-discharge: Low Self-discharge
  • Vibration Resistance: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Compatibility Note: Requires use of all existing cables and hardware from original configuration
  • Intended Use: APC CURK11

Benefits

  • Built to Last: The valve regulated, spill-proof design and robust vibration resistance ensure these batteries hold up in demanding UPS environments, delivering a durable replacement solution.
  • Extended Readiness: Low self-discharge characteristics make this pack a dependable long-lasting battery option that retains charge during storage and standby periods.
  • High Output Capability: High rate discharge design supplies strong current for short durations — key for UPS transfer events — classifying these cells as a high-performance UPS battery for the APC CURK11.
  • Certified Safety: U.L. recognition and CE certification provide reassurance that these batteries meet recognized safety benchmarks.
  • Versatile Use Cases: Perfect for Uninterruptible Power Supply units, emergency power applications, and battery-powered tools that fit the 12V 18AH specification.
  • Easy Replacement: This replacement UPS battery set is factory tested by experienced technicians and intended to be installed using your original cables and hardware for a seamless swap.

Don’t wait until your APC CURK11 fails during a critical event. Purchase this tested, high-quality replacement UPS battery set today to restore reliable backup power. Need assistance? Our customer service experts are available to help — in-stock 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 CURK11
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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