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SigmasTek  |  SKU: BW-14207

National NB6-20 Compatible Replacement Battery 8.61 lb

26% off
Sale price $74.99 USD Regular price $100.99
Shipping calculated at checkout.
Absorbent Glass Mat (AGM) technology for enhanced performance
Maintenance-free with spill-proof construction for hassle-free use
U.L. Recognized and CE Certified for safety and reliability
Brand new and factory fresh ensuring optimal battery life
1-year warranty for peace of mind and guaranteed quality
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.


Volts & Amps

6 Volts | 20 Ah

Terminal Type

Nut & Bolt

National Battery NB6-20 Replacement Battery (Compatible with National Battery NB6-20)

Designed as a direct-fit replacement for the National Battery NB6-20, this SigmasTek replacement battery combines compatibility with proven SLA performance. The sealed lead acid design with AGM technology provides a maintenance-free, spill-proof power source suitable for a range of applications. If you need a long-lasting battery that reliably delivers steady power for standby or cycling use, this high-performance battery meets OEM SLA specifications and includes requested safety certifications for worry-free operation.

Key Specifications

  • Model: NB6-20 (Replacement for National Battery NB6-20)
  • Replacement Brand: SigmasTek
  • Compatible OEM Brand: National Battery
  • Battery Type: Rechargeable Sealed Lead Acid (SLA)
  • Technology: Absorbent Glass Mat (AGM)
  • Voltage: 6 Volts
  • Capacity: 20 Ah
  • Terminal Type: Nut & Bolt
  • Design: Maintenance-Free, Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year

Benefits

This NB6-20 replacement battery is built for longevity and dependable use. AGM technology ensures excellent recharge efficiency and reduced self-discharge rates, helping the battery remain ready for use after long storage periods. The maintenance-free aspect reduces the need for upkeep, while the spill-proof construction improves safety during installation and transport.

  • Durability: Rugged internal components and AGM plates tolerate vibration and repeated cycles.
  • Long Life: Engineered to provide reliable performance over many charge/discharge cycles as a long-lasting battery.
  • High Performance: Stable, consistent output supports sensitive electronics, ensuring smooth operation under load.
  • Safety & Compliance: U.L. recognized and CE certified for dependable, standardized operation.
  • Typical Applications: Excellent for UPS systems, emergency backup and lighting, alarm and security systems, mobility devices, and power tools.

Ready to replace your National Battery NB6-20? Purchase this high-performance replacement battery now to secure dependable, long-lasting power backed by a 1 year warranty. Click to order and get a brand new, factory fresh unit today.

Technical Specifications

Voltage6 Volts
Amp Hours20 Ah
Terminal TypeNut & Bolt
Length (in.)6.18
Width (in.)3.27
Height (in.)4.92
Weight (lb.)8.6

Product Highlights

  • Brand Replacement : National Battery NB6-20
  • Manufacturer: SigmasTek
  • Product Type: SLA Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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