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-15286

SigmasTek Mighty Max ML55-12 High Performance Replacement Battery 36.03 lb

9% off
Sale price $209.99 USD Regular price $229.99
Shipping calculated at checkout.
Compatible replacement for Mighty Max ML55-12 SLA battery
Uses Absorbent Glass Mat (AGM) technology for enhanced performance
Maintenance-free with spill-proof design for safety and convenience
U.L. Recognized and CE Certified for quality assurance
Includes 1-year warranty and brand new, factory fresh condition
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 | 55 AH

Terminal Type

Nut & Bolt

Mighty Max ML55-12 Replacement Battery — Compatible with Mighty Max ML55-12

When your device calls for a Mighty Max ML55-12 compatible battery, choose a replacement battery engineered to meet or surpass OEM SLA standards. This sealed lead acid option delivers dependable performance and the peace of mind of safety certifications. The SigmasTek replacement for Mighty Max ML55-12 is designed for everyday reliability and is an excellent match for backup and portable power applications.

Key Specifications

  • Compatible Model: Mighty Max ML55-12
  • Battery Type: Rechargeable Sealed Lead Acid (SLA)
  • Technology: Absorbent Glass Mat (AGM)
  • Design: Maintenance-Free with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 55 AH
  • Terminal Type: Nut & Bolt

Benefits

This replacement for the Mighty Max ML55-12 offers a combination of rugged durability and long life. The AGM, maintenance-free design reduces corrosion and electrolyte maintenance while providing excellent charge acceptance and reliable discharge performance. As a high-performance battery replacement, it maintains steady voltage under load and recharges efficiently for repeated duty cycles.

Ideal uses include UPS backup, emergency power systems, security and alarm systems, medical standby devices, and a wide range of power tools and portable equipment. The sealed, spill-proof construction makes this long-lasting battery safe for indoor use and reduces the need for routine service checks.

With U.L. and CE recognition, factory-fresh condition, and a 1 Year Warranty from SigmasTek, this replacement battery delivers the reliability and safety expected by professionals and DIY users alike. The 12 Volt, 55 AH specification and robust Nut & Bolt terminals ensure a secure, drop-in replacement for your Mighty Max ML55-12 needs.

Take action now—purchase the replacement for Mighty Max ML55-12 battery today to secure a high-performance, long-lasting battery that keeps your systems running smoothly.

Technical Specifications

Voltage12 Volts
Amp Hours55 AH
Terminal TypeNut & Bolt
Length (in.)9.04
Width (in.)5.45
Height (in.)8.15
Weight (lb.)36.0

Product Highlights

  • Brand Replacement : Replacement For Mighty
  • 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.