Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com

WELCOME5
SigmasTek  |  SKU: BW-16094

Union Battery MX-12240 High Performance Replacement Battery 18.1 lb

9% off
Sale price $111.99 USD Regular price $122.99
Shipping calculated at checkout.
Absorbent Glass Mat (AGM) technology for enhanced performance
Maintenance-free and spill-proof design for hassle-free use
U.L. Recognized and CE Certified for safety and quality assurance
Brand new, factory fresh for reliable power and longevity
Comes with a 1-year warranty for peace of mind
In stock

— Ready to ship immediately

Free shipping

Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe

Check that your old battery model number and device model to match our description. This makes sure they work together.


We ship your order same day if you buy it before 4 PM EST.

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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.


Volts & Amps

12 Volts | 26 Ah

Terminal Type

Nut & Bolt

Union Battery MX-12240 Replacement Battery — Compatible with MX-12240

When your device needs a reliable replacement battery, the Union Battery MX-12240 offers compatibility, performance, and peace of mind. This sealed lead acid (SLA) unit is designed to meet or exceed OEM specifications and provide steady power for critical backup systems and everyday applications. Choose this high-performance battery to ensure your equipment runs reliably under load and during power interruptions.

Key Specifications

  • Model: Union Battery MX-12240
  • Chemistry: Sealed Lead Acid (SLA)
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Voltage: 12 Volts
  • Capacity: 26 Ah
  • Terminal Type: Nut & Bolt
  • Maintenance: Maintenance-Free Design with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Replacement/Brand Reference: SigmasTek

Benefits

  • Durability: Robust AGM construction and spill-proof design provide long-term reliability and minimize the risk of leakage and corrosion.
  • Long life: Designed as a long-lasting battery to hold charge through many cycles, ensuring dependable backup power for UPS systems and emergency devices.
  • High performance: Consistent 12V delivery and stable current output make this replacement battery suitable for sensitive electronics, telecom gear, and portable equipment.
  • Safe and certified: U.L. Recognized and CE Certified, making it appropriate for installations that require recognized safety standards.
  • Maintenance-free: AGM technology eliminates the need for electrolyte maintenance, simplifying routine care and installation.
  • Typical applications: Ideal for UPS backups, emergency lighting, security alarm systems, medical backups, and various power tool or portable power needs.

Don’t wait until your equipment fails—replace the battery now with the Union Battery MX-12240 replacement battery for reliable, long-lasting battery performance. Purchase today and keep your systems protected.

Technical Specifications

Voltage12 Volts
Amp Hours26 Ah
Terminal TypeNut & Bolt
Length (in.)6.56
Width (in.)6.97
Height (in.)4.92
Weight (lb.)18.08

Product Highlights

  • Brand Replacement : Union Battery MX-12240
  • Manufacturer: SigmasTek
  • Product Type: SLA Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.