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-1578

Best Power LI 5.0KVA High Performance Replacement Battery Set 74.17 lb

25% off
New arrival
Sale price $347.99 USD Regular price $461.99
Shipping calculated at checkout.
Comes with 3 batteries for Best Power LI 5.0KVA UPS
AGM technology for superior durability and performance
Guaranteed fit with Best Power UPS systems
UL certification ensures safety and reliability
1-year warranty provided
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

Best Power LI 5.0KVA Replacement - 3 x 12V 35AH (NB Terminal)

Replace worn batteries in your Best Power LI 5.0KVA with this complete three-battery replacement pack designed for dependable, long-term performance. These replacement UPS battery units use AGM sealed Absorption Glass Mat construction and are UL certified to ensure safe, maintenance-free operation while meeting or exceeding the original manufacturer's specifications.

Key Specifications

  • Compatible UPS Model: Best Power LI 5.0KVA
  • Package contains: 3 batteries (price includes all 3)
  • Voltage: 12 V
  • Amp Hours: 35 AH
  • Chemistry: SLA (Sealed Lead Acid)
  • AGM Technology: Absorption Glass Mat sealed construction
  • Terminal: NB (Nut & Bolt)
  • Weight (per battery): 74.1Lbs
  • Dimensions (per battery): Length 7.72 In, Width 5.14 In, Height 6.14 In
  • Warranty: 1-year Warranty
  • Certification: UL (Underwriters Laboratories) certified
  • Brand / Spec Sheet: SigmasTek UPS Batteries Spec Sheets referenced
  • Shipping Methods: UPS Ground and USPS
  • Handling: We ship in 1 business day for all in-stock items
  • Guaranteed compatibility with original battery set

Benefits

  • Durability: The sealed AGM design prevents spills and reduces corrosion, making these units robust choices for rack, floor, or cabinet-mounted UPS systems.
  • Long life: Engineered as a long-lasting battery solution, these replacements maintain capacity and performance over repeated discharge/charge cycles.
  • High performance: This high-performance UPS battery pack supplies the stable voltage and capacity required by the Best Power LI 5.0KVA for clean switchovers and sustained backup power.
  • Maintenance-free: SLA/AGM chemistry provides maintenance-free operation—no watering and minimal monitoring required.
  • Easy swap-in: Install in the same configuration as the original batteries and reuse existing cables and hardware; NB (nut & bolt) terminals are compatible with factory connections.
  • Applications: Ideal for UPS systems, emergency power backup, telecom closets, server rooms, point-of-sale, and other critical loads.
  • Safety & support: UL certification and guaranteed compatibility provide confidence, and customer support is available via email, chat, or toll-free at (800) 657-1303 for any questions.

Ensure uninterrupted protection for your Best Power LI 5.0KVA by ordering this reliable three-pack of replacement batteries today. Fast shipping and a one-year warranty make it easy to restore full backup capability—purchase now to secure your equipment.

Technical Specifications

Voltage12 Volts
Amp Hours35 AH
Terminal TypeNut & Bolt
Length (in.)7.72
Width (in.)5.14
Height (in.)6.22
Weight (lb.)74.1

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.