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SigmasTek  |  SKU: BW-5370

Best Technologies FERRUPS FES 850VA UPS High Performance Replacement Battery 12.66 lb

16% off
New arrival
Sale price $55.99 USD Regular price $66.99
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Advanced AGM technology for stable and long-lasting power
High rate discharge design for quick energy delivery
Maintenance-free with spill proof construction for safety
U.L. Recognized and CE Certified for quality assurance
Brand new with a 1 year warranty for peace of mind
In stock

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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 | 18 Ah

Terminal Type

Nut & Bolt

Replacement SigmasTek 12V 18Ah for Best Technologies FERRUPS FES 850VA

This replacement UPS battery is a direct-fit substitute for the Best Technologies FERRUPS FES 850VA, offering dependable, maintenance-free power protection to keep your UPS performing at peak levels. With AGM technology, a high rate discharge design, and factory-fresh quality, this long-lasting battery delivers the reliable performance required for emergency power and critical backup applications.

Key Specifications

  • Compatible UPS model: Best Technologies FERRUPS FES 850VA
  • Battery type: Sealed Lead Acid (SLA) with Absorbent Glass Mat (AGM) Technology
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal type: Nut & Bolt
  • Brand: SigmasTek / Best Technologies compatible replacement
  • Design: High Rate Discharge
  • Maintenance: Maintenance-Free, Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year

Benefits

  • Durability and Long Life: Constructed with AGM technology, this replacement UPS battery is built to last and resist the stresses of repeated charge cycles. The sealed design minimizes maintenance and extends useful life for the FERRUPS FES 850VA.
  • High Performance: High rate discharge capability ensures the battery can provide reliable power delivery during urgent, short-duration demands—making it a high-performance UPS battery suitable for sensitive electronics and emergency systems.
  • Safe and Certified: U.L. recognition and CE certification demonstrate compliance with stringent safety standards, providing assurance in mission-critical environments.
  • Versatile Applications: Ideal for UPS systems, emergency power backup, and battery-powered tools, this long-lasting battery supports a wide range of use cases where dependable backup power is essential.
  • Easy Installation: Nut & bolt terminals and confirmed compatibility with Best Technologies FERRUPS FES 850VA simplify replacement, minimizing downtime and service effort.

Get your Best Technologies FERRUPS FES 850VA back to full protection—order this reliable, long-lasting replacement UPS battery today. In-stock, factory-new, and backed by a one-year warranty, it’s the practical choice for dependable backup power. Purchase now to ensure continued protection.

Technical Specifications

Voltage12 Volts
Amp Hours18 Ah
Terminal TypeNut & Bolt
Length (in.)7.13
Width (in.)3.0
Height (in.)6.59
Weight (lb.)12.65

Product Highlights

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

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