Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com

WELCOME5
SigmasTek  |  SKU: BW-4777

Best Power FERRUPS FE 3.1KVA UPS High Performance Replacement Battery Set 98.89 lb

24% off
New arrival
Sale price $459.99 USD Regular price $601.99
Shipping calculated at checkout.
Set of 4 replacement batteries for Best Power UPS units
High vibration resistance for durability in UPS systems
Valve regulated construction prevents spills
Low self-discharge for extended shelf life
Comes brand new with 1 year warranty
In stock

— Ready to ship immediately

Free shipping

Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe

Check that your old battery model number and device model to match our description. This makes sure they work together.


We ship your order same day if you buy it before 4 PM EST.

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.


Volts & Amps

12 Volts | 35 AH

Terminal Type

Nut & Bolt

Replacement SigmasTek SP12-35 NB Battery Set for Best Power FERRUPS FE 3.1KVA

Bring dependable power back to your Best Power FERRUPS FE 3.1KVA with this compatible replacement UPS battery set engineered for consistent performance and proven reliability. This four-battery package offers a robust solution for restoring runtime to mission-critical UPS systems, combining high-rate discharge capability with low self-discharge properties to keep your infrastructure protected.

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 FE 3.1KVA

Benefits

This high-performance UPS battery pack is built for longevity and stable operation under demanding conditions. The high rate discharge design supports short-duration, high-power demands common in UPS transitions, while valve-regulated spill-proof construction minimizes maintenance and enhances safety. Low self-discharge extends shelf life and helps ensure the batteries are ready when needed. High vibration resistance makes this set suitable for installations in racks, cabinets, or other environments subject to movement or vibration. With U.L. recognition and CE certification, you get certified quality you can trust.

Typical applications include Uninterruptible Power Supply units, emergency power systems, and battery-powered tools that require reliable bursts of power. As a long-lasting battery option, this set provides the durability expected by IT professionals, facility managers, and service technicians. Each unit is brand new and factory tested to meet or exceed OEM expectations so you can confidently replace the aging cells in your Best Power FERRUPS FE 3.1KVA.

To install, reuse the existing cables and hardware from your original battery configuration. Buy this replacement UPS battery set today to restore reliable backup power and improve the resilience of your critical systems.

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

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.