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SigmasTek  |  SKU: BW-2155

Best Power LI 1020 (Fortress) UPS High Performance Compatible Replacement Battery Set 16.33 lb

17% off
New arrival
Sale price $88.99 USD Regular price $106.99
Shipping calculated at checkout.
Includes 4 fresh SigmasTek SP6-12HR batteries (6V 12AH)
High rate discharge for reliable emergency power
Valve regulated, spill-proof design for safety
Low self-discharge maintains charge longer
Factory tested and includes 1-year warranty
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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

6 Volts | 12 Ah

Terminal Type

F2

Replacement Battery Set for Best Power LI 1020 (Fortress) UPS - SigmasTek SP6-12HR (4-Pack)

Protect your Best Power LI 1020 (Fortress) UPS with a compatible, reliable replacement UPS battery set. This kit contains four SigmasTek SP6-12HR batteries that provide a high-performance UPS battery solution with the durability and low-maintenance characteristics you expect. Use your existing cabling and hardware for a simple replacement process and restore critical backup power quickly.

Key Specifications

  • Compatible UPS Model: Best Power LI 1020 (Fortress)
  • Battery Model: SigmasTek SP6-12HR
  • Quantity: 4 batteries per set
  • Voltage: 6 Volts
  • Capacity: 12 AH
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated, Spill Proof
  • Self-discharge: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

These replacement batteries are optimized for systems that require fast, reliable power delivery. The high rate discharge design supports short-duration high-power demands, making it an excellent choice for Uninterruptible Power Supply units and emergency power systems. With low self-discharge, the batteries will remain ready for use over long standby periods, ensuring your UPS is prepared when you need it most.

Valve regulated, spill-proof construction reduces maintenance and improves safety for indoor deployments, while high vibration resistance helps sustain performance in mobile or vibration-prone environments. U.L. recognized and CE certified production confirms adherence to safety and quality standards.

Ideal for applications such as UPS units, emergency power supply backup, and battery powered tools, this replacement UPS battery set offers a dependable, long-lasting battery option. Each unit is factory fresh and tested to meet or exceed OEM specifications for the Best Power LI 1020 (Fortress), and includes a 1 year warranty for confidence in your investment.

Restore full runtime and reliability to your Best Power LI 1020 (Fortress) today—purchase this replacement UPS battery set now for dependable performance and fast shipping.

Technical Specifications

Voltage6 Volts
Amp Hours12 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.0
Height (in.)3.7
Weight (lb.)16.32

Product Highlights

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

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