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SigmasTek  |  SKU: BW-3609

Best Power LI 520 UPS High Performance Replacement Battery Set 10.51 lb

26% off
New arrival
Sale price $53.99 USD Regular price $72.99
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Replacement set with 2 SigmasTek SP12-7.5HR batteries (12V 7.5AH)
High rate discharge design supports UPS and battery-powered tools
Valve regulated spill-proof technology reduces maintenance needs
Low self-discharge keeps batteries ready for use over time
U.L. recognized, CE certified, and covered by a 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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Volts & Amps

12 Volts | 7.5 Ah

Terminal Type

F2

Replacement Battery Set for Best Power LI 520 UPS

Optimized for the Best Power LI 520, this replacement UPS battery set offers precise compatibility, strong performance, and reliable long-term operation. The set contains 2 SigmasTek SP12-7.5HR batteries (12 Volts 7.5 AH), engineered for high rate discharge applications where brief, high-power output is required. These factory fresh, brand new batteries are tested to meet or exceed OEM standards and integrate easily using your existing cables and installation hardware.

Key Specifications

  • Included: 2 x SigmasTek SP12-7.5HR batteries
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Battery Model: SP12-7.5HR
  • Terminal: F2
  • Brand: SigmasTek
  • 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 With: Best Power LI 520 Uninterruptible Power Supply (UPS)

Benefits

This replacement UPS battery set is engineered to provide durability and a long reliable service life for the Best Power LI 520. Valve-regulated and spill-proof construction minimizes maintenance and risk, while low self-discharge keeps the batteries ready after storage or seasonal downtime. High vibration resistance increases suitability for environments with mechanical stress, and recognized safety certifications ensure dependable compliance.

As a high-performance UPS battery option, the SP12-7.5HR cells support high rate discharge needs that occur during transient loads or power outages. Ideal uses include Uninterruptible Power Supply (UPS) units, Emergency Power Supply systems, and battery powered tools where immediate, reliable backup power is essential. Each battery set is checked by trained technicians to ensure consistent performance and compatibility with your Best Power LI 520.

With excellent value and fast fulfillment for in-stock items, this replacement battery set is an efficient way to restore your UPS’s protective capabilities and extend the useful life of your equipment.

Ready to protect your Best Power LI 520 again? Order this long-lasting, high-performance replacement UPS battery set now and get dependable backup power delivered quickly.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)10.5

Product Highlights

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

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