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SigmasTek  |  SKU: BW-5053

ONEAC ON2000A-SN UPS High Performance Compatible Replacement Battery Set 50.64 lb

21% off
New arrival
Sale price $216.99 USD Regular price $273.99
Shipping calculated at checkout.
Includes 4 brand new SigmasTek SP12-18HR batteries (12V 18 AH)
High rate discharge design for superior short-term power output
Valve regulated, spill-proof construction for safe and reliable use
Low self-discharge and high vibration resistance for longer battery life
U.L. recognized, CE certified, and backed by a 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 | 18 Ah

Terminal Type

Nut & Bolt

SigmasTek SP12-18HR Replacement Battery Set for ONEAC ON2000A-SN UPS

Replace worn batteries in your ONEAC ON2000A-SN with this compatible SigmasTek SP12-18HR replacement UPS battery set. Engineered for consistent performance and tested to match OEM standards, this pack delivers the reliable power your UPS needs for emergency readiness and smooth operation. Installation requires use of your existing cables and hardware from the original configuration.

Key Specifications

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

Benefits

This replacement UPS battery set offers a long-lasting battery option tailored to the ONEAC ON2000A-SN. The high-rate discharge design ensures the pack can deliver short bursts of elevated power when your UPS transitions loads or supports high-efficiency equipment. As a high-performance UPS battery, the SP12-18HR provides dependable runtime, low self-discharge for extended shelf life, and rugged construction to withstand vibration and rough handling.

Safety-focused valve regulated, spill-proof design reduces maintenance and risk, while U.L. recognition and CE certification give assurance that these batteries meet established quality and safety standards. They are factory fresh and individually tested to meet or exceed OEM expectations, making them suitable for a range of applications including uninterruptible power supply units, emergency power supplies, and battery-powered tools that require reliable backup energy.

If you need help selecting or installing replacement batteries for the ONEAC ON2000A-SN, contact our support team at or email us for expert assistance. Orders for in-stock items commonly ship within 24 hours so you can restore protection quickly.

Ready to upgrade to a dependable, long-lasting battery solution? Purchase this high-performance replacement UPS battery set for your ONEAC ON2000A-SN today and protect your critical systems with confidence.

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 : ONEAC ON2000A-SN
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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