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-3270

Best Power LI 1020 (Fortress II) UPS High Performance Replacement Battery Set 15.77 lb

10% off
New arrival
Sale price $78.99 USD Regular price $87.99
Shipping calculated at checkout.
Includes 3 high quality SigmasTek SP12-7.5HR batteries (12V 7.5Ah)
Designed for high rate discharge UPS applications
Valve regulated spill-proof construction for safety
Low self-discharge and vibration resistant for long life
Brand new, factory fresh with 1 year warranty and fast shipping
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 | 7.5 Ah

Terminal Type

F2

SigmasTek SP12-7.5HR Replacement Battery Set for Best Power LI 1020 (Fortress II)

Keep your Best Power LI 1020 (Fortress II) protected with this factory-fresh replacement UPS battery set. Built for compatibility and reliable output, this replacement UPS battery pack restores runtime and provides consistent, high-performance backup power for critical equipment in office, industrial, and home applications.

Key Specifications

  • Battery Model: SigmasTek SP12-7.5HR
  • Quantity: 3 batteries included
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Connector/Terminal string (from product text): F2 (included in footer text)

Benefits

This long-lasting battery pack is optimized for demanding UPS use, delivering the short bursts of high current needed in many failure scenarios thanks to its high rate discharge design. As a high-performance UPS battery replacement, it offers consistent, repeatable cycles and low self-discharge to keep your Best Power LI 1020 (Fortress II) ready when power interruptions occur. The valve regulated, spill-proof build reduces maintenance concerns and increases safety in enclosed UPS cabinets.

Durability features like high vibration resistance make these batteries appropriate for rack-mounted equipment and mobile installations, while U.L. recognition and CE certification reflect adherence to recognized safety standards. Typical applications include UPS units, emergency power supply setups, and battery powered tools—anywhere dependable backup power is essential. Our technical staff tests each set to ensure it meets or exceeds OEM specifications.

Note that you must reuse all existing cables and hardware from your original configuration to connect these replacement batteries to your Best Power LI 1020 (Fortress II). Proper installation maintains compatibility with your UPS monitoring and charging systems.

Purchase this replacement UPS battery set for the Best Power LI 1020 (Fortress II) now to enjoy reliable backup performance, fast shipping on in-stock items, and a 1 year warranty. Secure your systems with a proven, high-performance, long-lasting battery solution today.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)15.75

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.