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SigmasTek  |  SKU: BW-4929

Enerwatt WP3.3-12 UPS Compatible Replacement Battery 2.98 lb

15% off
New arrival
$28.99 USD $33.99
Shipping calculated at checkout.
Replacement battery for Enerwatt WP3.3-12 UPS unit
High rate discharge for short bursts of high power
Valve regulated spill-proof and low self-discharge
UL recognized and CE certified with 1-year warranty
Factory fresh and OEM compatible
In stock

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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.
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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.

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.

Category

UPS Batteries

Brand Replacement

SigmasTek

Volts & Amps

12 Volts | 3.5 Ah

Terminal Type

F1

SigmasTek SP12-3.5 Replacement for Enerwatt WP3.3-12

Bring dependable backup power to your Enerwatt WP3.3-12 with the SigmasTek SP12-3.5 replacement UPS battery. Engineered for compatibility, steady performance, and safe operation, this high-performance UPS battery offers the immediate energy delivery that many UPS systems require. For proper connection, please reuse all existing cables and hardware from your original setup when installing this replacement UPS battery.

Key Specifications

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

Benefits

As a high-performance UPS battery, the SigmasTek SP12-3.5 is tailored for applications where rapid, high current output is necessary for short intervals. The high rate discharge design provides responsive power to the Enerwatt WP3.3-12 during outages, ensuring minimal disruption to connected devices. Low self-discharge extends the battery’s usable life during storage, making it a practical and long-lasting battery option for both emergency and standby use.

Valve regulated, spill-proof construction enhances safety and simplifies handling and maintenance. High vibration resistance contributes to longer service life in environments subject to movement or vibration. The battery’s U.L. recognition and CE certification mean it adheres to established safety and quality standards. Each battery is brand new and factory tested to meet or exceed OEM performance expectations.

Recommended applications include Uninterruptible Power Supply (UPS) units like the Enerwatt WP3.3-12, emergency power systems, and battery-powered tools that require dependable bursts of energy. Our technical team verifies each unit so you can trust consistent, reliable performance when it matters most.

Ready to upgrade your Enerwatt WP3.3-12 with a reliable replacement UPS battery? Buy the SigmasTek SP12-3.5 today for fast shipping, dependable performance, and a 1 year warranty.

Technical Specifications

Voltage12 Volts
Amp Hours3.5 Ah
Terminal TypeF1
Length (in.)5.24
Width (in.)2.64
Height (in.)2.36
Weight (lb.)2.98

Product Highlights

  • Brand Replacement : Enerwatt WP3.3-12
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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