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SigmasTek  |  SKU: BW-3145

Alpha Technologies Nexsys 900 UPS High Performance Replacement Battery Set 21.02 lb

23% off
New arrival
Sale price $105.99 USD Regular price $137.99
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Four brand new 12V 7.5AH SigmasTek batteries included for the Nexsys 900 UPS
High rate discharge design supports rapid power delivery in critical moments
Valve regulated, spill-proof to prevent leaks and ensure safe operation
Low self-discharge and vibration resistance improve battery longevity
UL recognized and CE certified with a 1-year warranty for quality assurance
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🔹 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.

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Volts & Amps

12 Volts | 7.5 Ah

Terminal Type

F2

Replacement SigmasTek SP12-7.5HR Battery Set for Alpha Technologies Nexsys 900 UPS

Replace worn cells in your Alpha Technologies Nexsys 900 with this reliable replacement UPS battery set. The pack includes four SigmasTek SP12-7.5HR batteries (12 Volts, 7.5 AH) designed for high rate discharge applications and dependable short-term power delivery. This long-lasting battery solution restores runtime and resilience to your Nexsys 900 so critical systems stay protected during outages.

Key Specifications

  • Included Quantity: 4 batteries (battery set)
  • Model: SigmasTek SP12-7.5HR
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Self-Discharge: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek (replacement for Alpha Technologies)

Benefits

As a high-performance UPS battery option for the Nexsys 900, this SigmasTek set offers immediate improvements in reliability and responsiveness. The high rate discharge capability supplies the extra current needed during transient events, while low self-discharge keeps the pack ready after storage or infrequent use. The valve regulated, spill-proof construction simplifies handling and reduces maintenance compared to flooded battery types.

Durability features such as high vibration resistance make this pack suitable for installations where mechanical stresses are present. With U.L. recognition and CE certification, these batteries meet important safety and quality benchmarks. Each battery is brand new, factory fresh, and tested by our experienced technical staff to ensure consistent, long-lasting battery performance that meets or exceeds OEM specifications.

Suitable applications include Uninterruptible Power Supply (UPS) units like the Alpha Technologies Nexsys 900, emergency power systems, and battery-powered tools requiring a compact and dependable power source. Installation requires reuse of all existing cables and hardware from your original configuration; this kit supplies the compatible batteries to restore your Nexsys 900.

Questions about the right replacement UPS battery? Contact our customer service at for expert help. In-stock orders typically ship within 24 hours. Purchase your SigmasTek SP12-7.5HR replacement set for the Alpha Technologies Nexsys 900 today and ensure uninterrupted protection for your equipment.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)21.0

Product Highlights

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

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