National NB6-3 High Performance Replacement Battery 1.37 lb
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National NB6-3 High Performance Replacement Battery is backordered and will ship as soon as it is back in stock.
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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
6 Volts | 3 Ah
Terminal Type
F1
National Battery NB6-3 Replacement Battery — Compatible with NB6-3
Designed as a direct replacement battery for the National Battery NB6-3, this sealed lead acid (SLA) unit delivers reliable performance and consistent power for emergency systems, small UPS units, and portable devices. Built using Absorbent Glass Mat (AGM) technology and a maintenance-free, spill-proof construction, the National Battery NB6-3 replacement battery offers dependable startup and sustained output when you need it most. If you’re searching for a high-performance battery that’s also a long-lasting battery option for critical backup applications, the NB6-3 meets or exceeds OEM specifications and provides 100% compatibility.
Key Specifications
- Compatible Model: National Battery NB6-3
- Brand: National Battery (Replacement) / SigmasTek
- Chemistry: Sealed Lead Acid (SLA) — Absorbent Glass Mat (AGM)
- Voltage: 6 Volts
- Capacity: 3 Ah
- Terminal Type: F1
- Design: Maintenance-Free, Spill Proof Construction
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year
Benefits
This NB6-3 high-performance battery is engineered for durability and reliable cycle life. AGM construction provides low internal resistance for efficient charge acceptance and reduced self-discharge, making it a long-lasting battery option for standby and cycling applications. The maintenance-free design eliminates the need to top up electrolyte, and spill-proof casing increases safety during installation and transport.
Typical applications include small uninterruptible power supplies (UPS), emergency lighting and power systems, medical devices, alarm systems, portable tools, and test equipment. Because it meets or exceeds OEM specifications, this replacement battery offers plug-and-play compatibility with systems designed for the NB6-3, giving you the confidence of a direct fit and immediate power restoration.
- Durable AGM construction for extended service life
- Reliable performance in standby and cyclic use
- Safe, maintenance-free operation — ideal for confined or sensitive installations
- UL and CE recognition for added compliance assurance
Ready to replace your worn NB6-3? Order this National Battery NB6-3 replacement battery today to restore dependable power. Click to add this high-performance, long-lasting battery to your cart and take advantage of our best-price guarantee and 1-year warranty.
Technical Specifications
Product Highlights
- Brand Replacement : National Battery NB6-3
- Manufacturer: SigmasTek
- Product Type: SLA Batteries
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Payment & Security
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