National Battery NB12-40 High Performance Replacement Battery 29.14 lb
— Ready to ship immediately
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.
National Battery NB12-40 High Performance Replacement Battery is backordered and will ship as soon as it is back in stock.
Let customers speak for us
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
✉ sales@batteryweb.com
Battery Care Tips
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
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
⚠️ 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 NB12-40 Replacement Battery — Compatible with National Battery NB12-40
When your National Battery NB12-40 needs replacement, choose this replacement battery that delivers OEM-level compatibility, dependable performance, and long-term reliability. This sealed lead acid (SLA) unit uses AGM technology for improved durability and charge efficiency. It’s a high-performance battery solution designed to meet the needs of demanding standby and cyclic applications.
Key Specifications
- Compatible Model: National Battery NB12-40
- Replacement Brand: SigmasTek
- Chemistry: Rechargeable Sealed Lead Acid (SLA)
- Technology: Absorbent Glass Mat (AGM)
- Voltage: 12 Volts
- Capacity: 40 Ah
- Terminal Type: Nut & Bolt
- Design: Maintenance-Free with Spill Proof Construction
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year
Benefits
This National Battery NB12-40 replacement is built for longevity, offering a long-lasting battery life thanks to AGM construction and quality manufacturing. The maintenance-free, spill-proof design simplifies installation and operation—no electrolyte handling or periodic maintenance is required. Robust construction means it stands up to vibration and frequent use in mobile or industrial environments.
Use this high-performance battery in UPS systems, emergency backup power, alarm and security systems, telecom equipment, and many types of power tools or utility devices. The 12V, 40 Ah capacity provides sufficient runtime for many critical systems, and the nut & bolt terminals create secure connections that are resistant to loosening in high-vibration scenarios.
Safety and quality are confirmed by U.L. recognition and CE certification, and each battery ships brand new and factory fresh. With a 1 year warranty included, you can purchase this replacement battery with confidence, knowing your investment is protected and that you’ll have reliable backup power when it matters most.
Replace your failing NB12-40 now—order this National Battery NB12-40 replacement battery today for a dependable, high-performance, long-lasting battery solution. Click to buy and secure reliable power with fast delivery.
Technical Specifications
Product Highlights
- Brand Replacement : National Battery NB12-40
- Manufacturer: SigmasTek
- Product Type: SLA Batteries
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
