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SigmasTek  |  SKU: BW-4778

Best Power FERRUPS FD 4.3KVA UPS High Performance Replacement Battery Set 98.89 lb

20% off
New arrival
Sale price $459.99 USD Regular price $573.99
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Includes 4 SigmasTek SP12-35 NB batteries (12V 35AH)
Designed for high rate discharge UPS applications
Leak proof valve regulated design for safety
Low self-discharge keeps batteries ready longer
1 year warranty and OEM quality guaranteed
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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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Volts & Amps

12 Volts | 35 AH

Terminal Type

Nut & Bolt

Replacement SigmasTek SP12-35 NB Battery Set for Best Power FERRUPS FD 4.3KVA

Restore full runtime to your Best Power FERRUPS FD 4.3KVA with this compatible, high-performance replacement UPS battery set. Designed for reliability and tested to meet OEM expectations, this four-battery pack provides consistent power delivery, low self-discharge, and rugged performance in a compact, maintenance-friendly package.

Key Specifications

  • Battery model: SigmasTek SP12-35 NB
  • Quantity: 4 batteries per set
  • Voltage: 12 Volts
  • Capacity: 35 AH (Amp-hours)
  • Terminal type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge, High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible UPS model: Best Power FERRUPS FD 4.3KVA

Benefits

This replacement UPS battery set emphasizes durability and high output when you need it most. The high rate discharge design enables superior short-term power delivery for UPS transfer events and demanding loads, while valve-regulated, spill-proof construction reduces leakage risk and maintenance. Low self-discharge ensures stored energy is maintained during standby periods, and high vibration resistance helps the cells survive transportation and installation in busy environments. Certified by U.L. and CE, these batteries meet recognized safety and performance standards.

As a high-performance UPS battery option, this set is ideal for Uninterruptible Power Supply units, emergency backup systems, and battery-powered tools requiring short bursts of elevated power. The brand-new, factory-fresh condition and one-year warranty offer peace of mind for technicians and system owners seeking a reliable replacement. Our testing protocols ensure these batteries meet or exceed OEM specifications for the Best Power FERRUPS FD 4.3KVA.

Installation uses your existing cables and hardware from the original configuration. Order this replacement UPS battery set now to secure a long-lasting battery solution that restores runtime and protects critical equipment connected to your Best Power FERRUPS FD 4.3KVA.

Technical Specifications

Voltage12 Volts
Amp Hours35 AH
Terminal TypeNut & Bolt
Length (in.)7.72
Width (in.)5.14
Height (in.)6.22
Weight (lb.)98.8

Product Highlights

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

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