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SigmasTek  |  SKU: BW-5044

ONEAC ONXBCU-417 UPS High Performance Replacement Battery Set 50.64 lb

25% off
New arrival
$216.99 USD $288.99
Shipping calculated at checkout.
Set of 2 SigmasTek SP12-35 NB batteries, 12 Volts, 35 AH
High rate discharge for superior UPS power output
Valve regulated and spill-proof for safe operation
Low self-discharge extends battery readiness
Factory fresh with 1-year warranty and OEM spec guarantee
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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We ship your order same day if you buy it before 4 PM EST.

Let customers speak for us

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

I'm writing this review to express my deep gratitude and appreciation for the quality of services provided to me by the BatteryWeb service team. I visited BatteryWeb to purchase a replacement battery for my Remington R9 razor. The staff was very responsive and I was really impressed with their willingness to help me and make the purchasing process as quick as possible. In particular I greatly appreciate the work of staff member Shane who was friendly and helpful.
In conclusion, I believe that BatteryWeb has excellent service staff who make their customers feel honored and valued.
I wish you all the best.
Sincerely,
Michael

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.

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.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

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

Category

UPS Batteries

Brand Replacement

SigmasTek

Volts & Amps

12 Volts | 18 Ah

Terminal Type

Nut & Bolt

Specifically intended for the ONEAC ONXBCU-417 UPS, this replacement battery set is a dependable, high-performance option to restore runtime and reliability. These SigmasTek cells are factory fresh and tested to provide the consistent power your ONXBCU-417 needs for critical backup and emergency systems.

Replacement Battery Set for ONEAC ONXBCU-417

Key Specifications

  • Included batteries: 4 x SigmasTek SP12-18HR
  • Voltage: 12 Volts
  • Capacity: 18 AH
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • 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
  • Terminal type: Nut & Bolt
  • Brand: SigmasTek (for ONEAC)

Benefits

  • Long-lasting battery performance with low self-discharge keeps the pack ready for service, reducing the need for frequent replacement.
  • High rate discharge capability supplies the immediate power demanded by UPS transfer events and short-term high loads — ideal for a high-performance UPS battery application.
  • Valve-regulated, spill-proof construction and U.L./CE recognition make this set a safe and compliant choice for commercial and industrial installations.
  • High vibration resistance improves durability in rack-mounted or mobile environments, extending the useful life of the battery pack.
  • Tested by technically savvy staff to meet or exceed OEM specifications, the SigmasTek SP12-18HR cells deliver reliability without the OEM price premium.
  • Common applications include UPS units, emergency power supplies, and battery-powered tools, providing versatile backup power across sites.
  • Installation tip: retain and reuse all existing cables and hardware from your original configuration to connect these batteries correctly.

Protect your equipment and restore runtime for the ONEAC ONXBCU-417 with this high-performance replacement UPS battery pack. Purchase now to receive fast shipping and dependable service.

Technical Specifications

Voltage12 Volts
Amp Hours18 Ah
Terminal TypeNut & Bolt
Length (in.)7.13
Width (in.)3.0
Height (in.)6.59
Weight (lb.)50.6

Product Highlights

  • Brand Replacement : ONEAC ONXBCU-417
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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