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-1563

Best Power FERRUPS FE 4.3KVA Compatible Replacement Battery Set 98.89 lb

24% off
New arrival
Sale price $459.99 USD Regular price $606.99
Shipping calculated at checkout.
Includes 4 replacement batteries in one package
AGM sealed design enhances battery life and performance
Compatible with Best Power UPS units using NB terminals
UL certification ensures safety compliance
1-year warranty for secure purchase
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 UPS Batteries for Best Power FERRUPS FE 4.3KVA - 12V 35AH (NB)

Ensure uninterrupted protection for your Best Power FERRUPS FE 4.3KVA with a complete four-battery replacement pack. These 12V 35AH sealed AGM units offer the reliability and safety expected from a quality replacement UPS battery. Designed to meet or exceed original specifications and UL certified, this high-performance UPS battery set brings dependable emergency power to servers, networking gear and other critical electronics that depend on resilient backup power.

Key Specifications

  • Package contains 4 batteries
  • SLA Chemistry
  • AGM Technology
  • Guaranteed compatibility with original battery set
  • 1-year Warranty
  • Volts: 12 V
  • Amp Hours: 35 AH
  • Weight: 98.8Lbs
  • Length: 7.72 In
  • Width: 5.14 In
  • Height: 6.14 In
  • Terminal: NB
  • SigmasTek UPS Batteries Spec Sheets
  • UL (Underwriters Laboratories) certified
  • Shipping Methods: UPS Ground and USPS
  • We ship in 1 business day for all in-stock items

Benefits

Built with Absorbent Glass Mat technology, this replacement UPS battery pack provides leak-proof, maintenance-free operation and excellent charge acceptance. As a high-performance UPS battery, it supplies consistent power during outages and recovers quickly during recharge cycles, helping to extend overall battery life. The sealed SLA construction means safe deployment in equipment racks, office environments, and enclosed UPS compartments.

Rugged and long-lasting, these batteries handle frequent cycling and mechanical stress, making them an ideal long-lasting battery option for everyday UPS backup, emergency power systems, and portable DC tool applications. Common applications include server backups, telecom systems, point-of-sale devices, emergency lighting and other critical loads that require stable DC power when AC fails. This full pack is sold to match the original Best Power configuration; reuse your existing cables and hardware and install in the same layout to preserve system integrity.

Before ordering, verify the physical dimensions of your current batteries to ensure fit—manufacturers may change requirements without notice. If you only need a single battery instead of the four-pack, visit UPS Batteries by V and AH to select the individual unit. For assistance, contact customer service via email, chat, or call toll free at (800) 657-1303.

Ready to replace your aging cells? Order this UL-certified, high-performance, long-lasting replacement UPS battery pack for the Best Power FERRUPS FE 4.3KVA now and enjoy fast shipping and a 1-year warranty.

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.