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SigmasTek  |  SKU: BW-4930

Energizer ER-HM450 UPS High Performance Replacement Battery 2.98 lb

19% off
New arrival
$28.99 USD $35.99
Shipping calculated at checkout.
Replacement for Energizer ER-HM450 UPS unit
High rate discharge for emergency and UPS applications
Valve regulated, spill-proof construction
Low self-discharge with UL and CE certification
Brand new with 1-year warranty included
In stock

— Ready to ship immediately
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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

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

F1

SigmasTek SP12-3.5 Replacement for Energizer ER-HM450

Ensure reliable backup power for your Energizer ER-HM450 with the SigmasTek SP12-3.5 replacement UPS battery. This brand new, factory-fresh battery is designed to deliver dependable short-term power bursts and consistent performance for the ER-HM450. For safety and correct installation, please reuse all existing cables and hardware from your original configuration when attaching 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

This high-performance UPS battery provides the quick-response power necessary for your Energizer ER-HM450 when the grid goes down. The high rate discharge design gives robust short-term current output, making it suitable for keeping critical equipment running during brief outages. Low self-discharge helps preserve charge during idle periods, making this a long-lasting battery option that stays ready when you need it most.

Valve regulated, spill-proof construction improves safety and reduces maintenance concerns, while high vibration resistance boosts reliability in environments with movement or mechanical stress. U.L. recognition and CE certification demonstrate compliance with recognized safety and quality standards. Each unit arrives brand new and factory tested to ensure it meets or exceeds OEM expectations for consistent operation.

Common uses include Uninterruptible Power Supply (UPS) units like the Energizer ER-HM450, emergency power systems that demand immediate backup, and battery-powered tools requiring dependable short-term energy. Our technical staff validates performance so you receive a tested, dependable replacement UPS battery every time.

Order the SigmasTek SP12-3.5 replacement UPS battery for your Energizer ER-HM450 now to restore reliable backup power. Purchase today for fast fulfillment, product confidence, 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 : Energizer ER-HM450
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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