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SigmasTek  |  SKU: BW-4774

Best Technologies FERRUPS FE 4.3KVA UPS High Performance Replacement Battery Set 98.89 lb

13% off
New arrival
Sale price $459.99 USD Regular price $528.99
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Replacement battery set for Best Technologies UPS models
High rate discharge design for peak power demands
Leak-proof valve regulated battery construction
Low self-discharge ensures longer battery availability
Brand new with 1 year warranty included
In stock

— Ready to ship immediately

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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 | 35 AH

Terminal Type

Nut & Bolt

SigmasTek SP12-35 NB (12V 35AH) Replacement Battery Set for Best Technologies FERRUPS FE 4.3KVA

Replace depleted batteries in your Best Technologies FERRUPS FE 4.3KVA with this dependable replacement UPS battery set. This four-battery pack of SigmasTek SP12-35 NB units is optimized for high-rate discharge performance and built to deliver reliable, long-lasting battery backup. Ideal for protecting critical electronics and power systems, these batteries combine safety certifications and rugged construction for peace of mind.

Key Specifications

  • Battery Model: SigmasTek SP12-35 NB
  • Quantity: 4 batteries included
  • Voltage: 12 Volts
  • Capacity: 35 AH (Amp-hours)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof (VRLA)
  • 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 Warranty
  • Compatibility Note: Requires use of all existing cables and hardware from original configuration to connect new batteries
  • OEM Fit: Replacement for Best Technologies FERRUPS FE 4.3KVA UPS units

Benefits

  • Durability: Engineered with valve-regulated, spill-proof construction and enhanced vibration resistance to withstand rigorous operational conditions.
  • Long Life: Low self-discharge characteristics enable sustained capacity retention, delivering consistent, long-lasting battery performance for backup systems.
  • High Performance: Designed for high rate discharge scenarios, these batteries handle short bursts of heavy power draw, qualifying them as a true high-performance UPS battery solution.
  • Safety & Compliance: U.L. recognition and CE certification ensure that these replacement batteries meet recognized safety and quality standards.
  • Multiple Uses: Suited for uninterruptible power supply (UPS) units, emergency power solutions, and battery-powered tools where dependable backup is required.
  • Tested & Ready: Each pack ships brand new and factory-tested to meet or exceed OEM specifications for the Best Technologies FERRUPS FE 4.3KVA.

Don’t wait until a power event exposes vulnerabilities in your Best Technologies FERRUPS FE 4.3KVA. Purchase this replacement UPS battery set now to secure reliable, long-lasting battery backup. Fast shipping available for in-stock items—order your high-performance UPS battery pack today.

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

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