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-13594

Mighty Max ML18-12 (NB) SigmasTek High Performance Replacement Battery 12.66 lb

15% off
Sale price $55.99 USD Regular price $65.99
Shipping calculated at checkout.
Compatible replacement for Mighty Max ML18-12 SLA battery
Uses advanced Absorbent Glass Mat (AGM) technology for superior performance
Maintenance-free and spill-proof design for safety and convenience
U.L. Recognized and CE Certified for quality assurance
Includes 1-year warranty and guaranteed best price
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 | 18 Ah

Terminal Type

Nut & Bolt

Replacement Battery for Mighty Max ML18-12 (NB) — SigmasTek 12V 18Ah (Nut & Bolt)

Looking for a direct replacement battery for your Mighty Max ML18-12 with Nut & Bolt terminals? This SigmasTek replacement battery is engineered to meet or exceed the OEM SLA specifications for the ML18-12 (NB) model. It combines dependable AGM technology with a maintenance-free, spill-proof design to deliver consistent, long-term performance. Whether you need a replacement battery for backup systems, security panels, or light-duty equipment, this high-performance battery gives you the reliability to keep critical systems running.

Key Specifications

  • Brand: SigmasTek
  • Compatible Model: Mighty Max ML18-12 (NB)
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt (NB)
  • Battery Technology: Absorbent Glass Mat (AGM)
  • Design: Maintenance-Free, Spill Proof Construction
  • Certifications: U.L. Recognized, CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Compatibility Guarantee: 100% compatibility with Mighty Max ML18-12

Benefits

  • Rugged reliability: AGM construction and a sealed, non-spill design create a resilient replacement battery ideal for demanding installations.
  • Maintenance-free operation: No watering or routine maintenance required, making it an excellent choice for installations where accessibility is limited.
  • Long-lasting battery life: Factory-new components and quality control deliver steady performance across standby cycles and regular discharges.
  • High-performance battery: Designed to supply consistent current for alarms, emergency devices, and backup power systems.
  • Safe and certified: U.L. recognition and CE certification offer assurance the battery meets recognized safety and performance standards.
  • Easy replacement: Nut & Bolt terminals simplify installation into systems that require secure screw-style connections.
  • Typical applications: UPS units, emergency lighting, security systems, fire alarm control panels, mobility equipment, and other 12V SLA applications.

Don’t compromise on power or compatibility—choose this SigmasTek replacement battery for your Mighty Max ML18-12 (NB). Order today to get a high-performance, long-lasting battery backed by a 1-year warranty and guaranteed fit for your equipment. Click to buy now and restore dependable power quickly.

Technical Specifications

Voltage12 Volts
Amp Hours18 Ah
Terminal TypeNut & Bolt
Length (in.)7.13
Width (in.)3.0
Height (in.)6.59
Weight (lb.)12.65

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
  • 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.