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SigmasTek  |  SKU: BW-13806

National Battery C18D High Performance Compatible Replacement Battery 2.76 lb

23% off
Sale price $22.99 USD Regular price $29.99
Shipping calculated at checkout.
Absorbent Glass Mat (AGM) Technology for superior performance
Maintenance-Free design with spill-proof construction
U.L. Recognized and CE Certified for safety and reliability
Brand new and factory fresh for long-lasting use
Includes a 1-year warranty for peace of mind
In stock

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Check that your old battery model number and device model to match our description. This makes sure they work together.


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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 | 7 AH

Terminal Type

F1

Replacement National Battery C18D - Compatible with C18D

This replacement National Battery C18D is engineered to meet or exceed OEM SLA battery specifications and provide dependable, maintenance-free power for emergency systems and standby equipment. If you require a replacement battery that combines safety, high performance, and a long-lasting battery life, the C18D-compatible unit delivers factory-fresh quality and certified reliability to keep critical devices operating without interruption.

Key Specifications

  • Model Compatibility: National Battery C18D
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Design: Maintenance-Free with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Voltage: 6 Volts
  • Capacity/Designation: 7 AHF1
  • Compatibility Note: Meets or exceeds OEM SLA battery specifications

Benefits

  • Rugged and Safe Design: The AGM and spill-proof construction create a sealed, vibration-resistant battery ideal for mounting in cabinets, panels, and compact enclosures found in emergency lighting and alarm systems.
  • Maintenance-Free Operation: As a sealed lead acid unit, this long-lasting battery eliminates the need for periodic electrolyte checks, simplifying upkeep for facility managers and homeowners alike.
  • Consistent High Performance: Built to match or exceed OEM SLA performance, this high-performance battery supports dependable charging and steady discharge profiles—critical for emergency power applications and continuous monitoring systems.
  • Versatile Usage: Suited for emergency lighting, security alarms, fire alarms, consumer electronics, medical equipment, and home & garden applications. Also applicable for UPS backup, emergency power modules, and tool charging in environments where sealed, maintenance-free batteries are preferred.
  • Certified Quality and Support: U.L. recognition and CE certification provide compliance confidence, while the included 1 year warranty and SigmasTek branding back the purchase with support.

Replace your worn C18D battery today to restore reliable emergency power and continuous system protection. Purchase now for competitive pricing, rapid shipping on in-stock items, and the assurance of a one-year warranty on this high-performance replacement battery.

Technical Specifications

Voltage6 Volts
Amp Hours7 AH
Terminal TypeF1
Length (in.)5.95
Width (in.)1.34
Height (in.)3.7
Weight (lb.)2.76

Product Highlights

  • Brand Replacement : National Battery C18D
  • Manufacturer: SigmasTek
  • Product Type: SLA Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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