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SigmasTek  |  SKU: BW-3003

Liebert GXT3-1500RT120 UPS High Performance Replacement Battery Set 21.02 lb

15% off
New arrival
$105.99 USD $123.99
Shipping calculated at checkout.
Set of 4 SigmasTek SP12-7.5HR batteries (12V 7.5 AH) for Liebert GXT3-1500RT120 UPS
High rate discharge capability ideal for UPS applications requiring short bursts of power
Spill-proof valve regulated design with high vibration resistance
Certified for safety and performance with U.L. and CE approvals
Brand new with 1-year warranty and ready for fast shipping
In stock

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from 22 reviews

WORKS GREAT!

Anonymous

Fast shipping and fair pricing. I will look to you for future battery purchases.

Anonymous

It's hard to rate a battery until some time has passed and it either continues functioning as it should of "gives up the ghost." It was not a straight bolt in application. The positive terminal was different than the stock battery and the positive lead from the motorcycle had to be bent in order to attach it to the battery. Otherwise, if the battery gives long service I have no complaints.

Anonymous

Shopping with you is a bit difficult; I had to type in a few words differently before I could find the battery's I was looking for.

Laura J

Excellent Product, timely delivery, love the extra battery life. Would recommend. rk

Robin Keister

Very easy to buy, high confidence that it was legit company. Reviews were good. Price, in the ball park. We'll see when I get battery.

Rob

Thank you for supplying the battery that I wanted. It arrived today in good order. Its specifications are as advertised and after charging, performs as expected.
Thank you for your professional approach to the payment method.
Regards Roy VK4ZQ.

Roy O'Malley

It worked

Mel Light

Finally found a battery that is similar in function to original equipment.

Anonymous

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In conclusion, I believe that BatteryWeb has excellent service staff who make their customers feel honored and valued.
I wish you all the best.
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Michael Talianker

this battery was just what I needed.

Robert Jones

Product is exactly as described and arrived quickly

Robert Jones

Great deal for the money.

Linda M.

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.

Easy to purchase

Alberto J.

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🔹 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.

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Category

UPS Batteries

Brand Replacement

SigmasTek

Volts & Amps

12 Volts | 7.5 Ah

Terminal Type

F2

Replacement Battery Set for Liebert GXT3-1500RT120

Replace aging batteries in your Liebert GXT3-1500RT120 with this reliable, factory-fresh replacement UPS battery set. Supplied as a 4-pack of SigmasTek SP12-7.5HR batteries, this set restores runtime performance and dependable protection for servers, networking equipment, and critical electronics. Remember to reuse the existing cables and hardware from your original setup to connect these batteries properly.

Key Specifications

  • Battery model: SigmasTek SP12-7.5HR
  • Quantity: 4 batteries per set
  • Voltage: 12 Volts
  • Capacity: 7.5 AH (amp-hours)
  • Terminal: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Performance features: Low Self-discharge; High Vibration Resistance; Superior Performance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible UPS model: Liebert GXT3-1500RT120

Benefits

Built to provide a long-lasting battery experience, these replacements feature low self-discharge characteristics for reliable storage and a valve-regulated, spill-proof design for safe, maintenance-free operation. High vibration resistance increases durability during transport and in active IT environments. U.L. recognition and CE certification provide added confidence in safety and quality.

As a high-performance UPS battery option, this set excels in high rate discharge scenarios where short bursts of elevated power are required to maintain critical loads. This makes it especially valuable for UPS systems like the Liebert GXT3-1500RT120 that support servers, storage arrays, telecommunications, and point-of-sale equipment — delivering the runtime necessary for graceful shutdowns or transition to backup generators.

Typical applications include Uninterruptible Power Supply (UPS) units, emergency power supply systems, and battery-powered tools that benefit from a dependable, repeatable power source. Each battery undergoes technical testing to ensure performance that meets or exceeds OEM specifications, giving you a cost-effective, dependable alternative to factory replacements.

Ensure uninterrupted protection for your Liebert GXT3-1500RT120 — buy this high-performance replacement UPS battery set today and enjoy fast shipping backed by a 1 year warranty.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)21.0

Product Highlights

  • Brand Replacement : Liebert GXT3-1500RT120
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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