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-13407

National Battery NB12-40IT High Performance Replacement Battery 29.14 lb

25% off
Sale price $150.99 USD Regular price $200.99
Shipping calculated at checkout.
High performance 12V 40AH SLA battery for reliable power
VRLA sealed technology allows safe operation in any position
Meets or exceeds original manufacturer specifications for quality
Wide operating temperature range ensures durability in various conditions
UL certified for safety and trusted performance
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 | 40 Ah

Terminal Type

Nut & Bolt

National Battery NB12-40IT Replacement Battery — Compatible with National Battery NB12-40IT

When your system demands higher capacity and steady performance, the National Battery NB12-40IT replacement battery delivers the power and longevity you need. This robust 12V 40AH SLA battery is a high-performance, long-lasting battery designed to meet or exceed original National Battery specifications. Built with VRLA sealed technology and engineered for heavy-duty duty cycles, the NB12-40IT is an excellent choice for demanding applications that require extended run-times and reliable standby power.

Key Specifications

  • Brand/Model: National Battery NB12-40IT
  • Volts: 12 V
  • Amp Hours: 40 AH
  • Terminal: NB (Nut & Bolt)
  • Technology: Valve-Regulated Lead Acid (VRLA) Sealed Battery
  • UL Certification: Underwriters Laboratories (UL) certified
  • Package contains: 1 battery
  • Warranty: 1-year Warranty
  • Weight: 29.07Lbs
  • Length: 7.76 In
  • Width: 6.5 In
  • Height: 6.69 In
  • Shipping: ETD: 3 Business Days; Shipping Methods – UPS Ground and USPS; We ship in 1 business day for all in-stock items
  • Sourced by: Batterysharks.com

Benefits

The NB12-40IT stands out as a durable, high-capacity replacement battery suited for systems that need extended backup time. Its 40AH capacity provides substantial energy storage for larger UPS systems, telecom equipment, renewable energy storage, mobility devices, and emergency power infrastructure. The robust construction and VRLA design make it maintenance-free and safe for indoor use, while the nut-and-bolt NB terminal ensures secure, low-resistance connections for higher current applications.

As a high-performance battery, the NB12-40IT handles heavy discharge cycles and recharges reliably, offering a long-lasting battery life that reduces replacement frequency and downtime. Wide operating temperature tolerance helps maintain performance in varied environmental conditions, and UL certification assures compliance with recognized safety standards. The included 1-year warranty and the guaranteed compatibility statement provide added confidence when replacing OEM cells.

If you require a dependable, high-capacity replacement battery, add the National Battery NB12-40IT to your cart now to secure reliable, long-lasting power for critical systems and applications.

Technical Specifications

Voltage12 Volts
Amp Hours40 Ah
Terminal TypeNut & Bolt
Length (in.)7.76
Width (in.)6.5
Height (in.)6.69
Weight (lb.)29.11

Product Highlights

  • Brand Replacement : National Battery NB12-40IT
  • 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.