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-13448

Simplex 12V 18Ah Retrofit High Performance Replacement Battery 12.66 lb

24% off
Sale price $55.99 USD Regular price $73.99
Shipping calculated at checkout.
High performance 12V 18AH SLA battery with NB terminal for reliable power
Valve-Regulated Lead Acid (VRLA) technology allows safe operation in any position
Wide operating temperature range ensures durability in various environments
Meets or exceeds original manufacturer specs for guaranteed compatibility
UL certified for safety and backed by a 1-year warranty
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

Simplex 12V 18AH - Retrofit Replacement Battery

The Simplex 12V 18AH - Retrofit replacement battery is engineered to deliver reliable compatibility, consistent performance, and dependable durability for systems that require a proven 12V 18AH power source. Built to meet or exceed the original manufacturer specifications, this high-performance battery offers a high discharge design, wide operating temperature range, and a long expected service life — making it an excellent choice whether you need backup power for safety-critical equipment or a dependable energy source for everyday use. If you are searching for a long-lasting battery that matches the form and function of your existing unit, the Simplex 12V 18AH - Retrofit provides direct-fit reliability and VRLA safety for installation in virtually any orientation.

Key Specifications

  • Brand: Simplex
  • Model: Simplex 12V 18AH - Retrofit
  • Volts: 12 V
  • Amp Hours: 18 AH
  • Terminal: NB
  • Technology: Valve-Regulated Lead Acid (VRLA) sealed battery technology
  • UL Certification: Underwriters Laboratories (UL) certified
  • Weight: 12.65Lbs
  • Length: 7.13 In
  • Width: 3 In
  • Height: 6.59 In
  • Package contains: 1 battery
  • Warranty: 1-year Warranty
  • Design features: High discharge design, wide operating temperature range, long expected service life
  • Compatibility: Guaranteed compatibility with original battery
  • ETD: 3 Business Days
  • Shipping Methods: UPS Ground and USPS
  • Shipping note: We ship in 1 business day for all in-stock items

Benefits

  • Durability: Constructed with VRLA sealed technology and certified by UL, the Simplex 12V 18AH - Retrofit replacement battery resists leakage and is safe to operate in any position, increasing installation flexibility and long-term reliability.
  • Long Life: Designed for a long expected service life, this long-lasting battery reduces the frequency of replacements and maintenance downtime, delivering extended value for critical systems.
  • High Performance: The high discharge design supports demanding loads and rapid power draw, making the unit a true high-performance battery suitable for a variety of applications.
  • Safety & Versatility: Sealed VRLA construction allows safe use near people and sensitive electronics, while the NB terminal provides a secure connection for retrofit applications.
  • Typical Applications: Ideal for uninterruptible power supplies (UPS), emergency lighting and power, alarm systems, medical equipment backups, telecom standby, and portable tools that require reliable 12V 18AH capacity.
  • Guaranteed Fit: Sourced to match original specifications and guaranteed compatibility, this replacement battery streamlines service and minimizes installation surprises.

Ready to replace your worn or underperforming battery? Choose the Simplex 12V 18AH - Retrofit replacement battery for a reliable, high-performance battery solution with VRLA safety and a 1-year warranty. Order now to restore dependable power and enjoy fast shipping and expert customer support.

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 : Simplex 12V 18AH
  • 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.