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SigmasTek  |  SKU: BW-1558

Best Power Unity UT3K Compatible Replacement Battery Set 98.89 lb

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New arrival
Sale price $459.99 USD Regular price $573.99
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Set of 4 replacement 12V 35AH AGM batteries for Best Technologies Unity UT3K UPS
UL listed for compliance with quality and safety standards
Nut & bolt terminals for guaranteed compatibility
Maintenance-free, sealed lead acid design for long life
Ships fast with 1-year warranty coverage
In stock

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Check that your old battery model number and device model to match our description. This makes sure they work together.


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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

12 Volts | 35 AH

Terminal Type

Nut & Bolt

Your Best Power Unity UT3K - Replacement Batteries

Get reliable replacement power for your Best Power Unity UT3K with this complete 4-battery set designed for compatibility, performance, and durability. These AGM sealed SLA batteries provide the dependable backup required by the UT3K to protect against data loss and downtime. Choose a replacement UPS battery that brings consistent runtime and trusted performance back to your system.

Key Specifications

  • Package contains: 4 batteries
  • Chemistry: SLA (Sealed Lead Acid)
  • Technology: AGM (Absorption Glass Mat)
  • Compatibility: Guaranteed compatibility with original battery set for Best Power Unity UT3K
  • Volts: 12 V
  • Amp Hours: 35 AH
  • Terminal type: NB (Nut & Bolt)
  • Weight (set listed): 98.8 Lbs
  • Dimensions (each): Length 7.72 In, Width 5.14 In, Height 6.14 In
  • Certifications: UL (Underwriters Laboratories) certified
  • Warranty: 1-year Warranty
  • Shipping: UPS Ground and USPS; shipped in 1 business day for in-stock items
  • Spec sheets: SigmasTek UPS Batteries Spec Sheets

Benefits

  • Durability: Robust AGM construction reduces maintenance and protects against vibration and shock for stable service life in varied environments.
  • Long life: Engineered to match or exceed OEM performance, providing a long-lasting battery solution that restores the UT3K’s runtime and reliability.
  • High performance: Consistent discharge profiles and dependable recharge capability mean your UPS maintains clean, continuous power during outages — a high-performance UPS battery suitable for critical applications.
  • Safety and certification: UL-certified components provide reassurance for deployment in professional settings.
  • Simple replacement: Install these batteries in the original configuration and reuse your existing cables and hardware for a quick and accurate swap.
  • Applications: Ideal for UPS backup, emergency power systems, telecommunications racks, server rooms, POS systems, and battery-backed tools.

Need to restore backup for your Best Power Unity UT3K? This high-quality, long-lasting battery pack offers the replacement UPS battery performance and safety certifications you expect. Order now to receive fast shipping and a dependable 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

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