National C18A Premium Replacement Battery 4.08 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 C18A Premium 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
6 Volts | 12 Ah
Terminal Type
F1
National Battery C18A Replacement Battery — Compatible with National Battery C18A
Upgrade to a dependable replacement National Battery C18A unit designed for full compatibility with the National Battery C18A model. This high-performance battery uses Absorbent Glass Mat (AGM) technology and a maintenance-free, spill-proof design to deliver consistent, reliable power. Ideal for devices that demand steady performance and safety certifications, the C18A replacement battery offers the long-lasting battery performance you need for critical applications such as UPS systems and emergency power supplies.
Key Specifications
- Compatible Model: National Battery C18A
- Replacement Brand: SigmasTek
- OEM Brand: National Battery
- Voltage: 6 Volts
- Capacity: 12 Ah
- Terminal Type: F1
- Technology: Absorbent Glass Mat (AGM)
- Design: Maintenance-Free, Spill Proof Construction
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
Benefits
The C18A replacement battery is built to provide durable, consistent energy for a variety of uses. AGM technology offers superior vibration resistance, leak-proof safety, and improved charge acceptance — characteristics that matter in backup power and frequent cycling environments. This maintenance-free battery removes the hassle of periodic water additions and reduces the risk of spills, making it an excellent choice for permanently installed systems and portable equipment alike.
Designed to be a long-lasting battery solution, the C18A replacement is suitable for UPS and emergency power systems, security and alarm equipment, telecom standby units, and small industrial tools. Its 6V 12Ah rating and F1 terminal configuration make it a straightforward, reliable replacement that restores original performance without compromise.
Certified by U.L. and CE, and shipped brand new and factory fresh, this replacement battery meets rigorous safety and quality standards so you can deploy it in sensitive or mission-critical environments with confidence. Backed by a 1 Year Warranty, it provides a balance of value and assurance.
Ready to replace your old battery? Buy the National Battery C18A replacement battery today for a high-performance, long-lasting battery solution that ensures compatibility and peace of mind.
Technical Specifications
Product Highlights
- Brand Replacement : National Battery C18A
- 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.
