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SigmasTek  |  SKU: BW-4911

OPTI-UPS VS575CB UPS Compatible Replacement Battery 2.98 lb

17% off
New arrival
$28.99 USD $34.99
Shipping calculated at checkout.
Replacement battery for OPTI-UPS VS575CB UPS unit
High rate discharge for quick power delivery
Valve regulated, spill-proof for safe operation
Low self-discharge and high vibration resistance
U.L. Recognized, CE Certified with 1 year warranty
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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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Category

UPS Batteries

Brand Replacement

SigmasTek

Volts & Amps

12 Volts | 3.5 Ah

Terminal Type

F2

SigmasTek SP12-3.5HR Replacement Battery — Compatible with OPTI-UPS VS575CB

Designed for a perfect fit and reliable performance, this SigmasTek SP12-3.5HR replacement UPS battery is a direct replacement for the OPTI-UPS VS575CB. Built for dependable power delivery, this high-performance UPS battery supports your UPS during short, high-load events and provides consistent, reliable backup when you need it most. Use your existing cables and hardware from the original configuration to install this battery quickly and safely. Whether protecting servers, network gear, or home electronics, this long-lasting battery delivers the performance and reliability OPTI-UPS VS575CB owners expect.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-3.5HR
  • Voltage: 12 Volts
  • Capacity: 3.5 AH
  • Terminal: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Resistance: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible UPS Model: OPTI-UPS VS575CB

Benefits

  • Durability: Engineered with valve regulated, spill-proof construction and high vibration resistance, this replacement UPS battery resists the wear and stresses of repeated charge/discharge cycles. The robust build helps protect sensitive equipment in harsh operating environments.
  • Long life and reliability: Low self-discharge chemistry keeps the battery ready for service after storage and reduces maintenance. Backed by a 1 year warranty and factory-fresh condition, this long-lasting battery provides confidence and predictable service life when installed in your OPTI-UPS VS575CB.
  • High performance on demand: The high rate discharge design makes this a high-performance UPS battery ideal for applications that require higher power output over short periods—exactly what many UPS and emergency power situations demand.
  • Versatile applications: Perfect for uninterruptible power supply (UPS) units, emergency power supply systems, and battery powered tools. This replacement UPS battery is tested to meet or exceed OEM specifications and is suitable wherever dependable short-duration power is required.
  • Certified safety: U.L. recognized and CE certified to industry standards for safe operation in consumer and professional UPS systems.

Ready to replace the drained or aging battery in your OPTI-UPS VS575CB? Order this SigmasTek SP12-3.5HR replacement UPS battery today for a fast, affordable upgrade to a high-performance, long-lasting battery. In-stock orders typically ship within 24 hours — buy with confidence and protect your equipment now.

Technical Specifications

Voltage12 Volts
Amp Hours3.5 Ah
Terminal TypeF2
Length (in.)5.24
Width (in.)2.64
Height (in.)2.36
Weight (lb.)2.98

Product Highlights

  • Brand Replacement : OPTI-UPS VS575CB
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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