National C03A High-Performance Replacement Battery 2.98 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 C03A 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
12 Volts | 3.5 Ah
Terminal Type
F1
National Battery C03A Replacement - Compatible with National Battery C03A
Upgrade your device with a replacement battery designed for dependable performance and complete compatibility. This National Battery C03A replacement is engineered to meet or exceed the OEM specifications, delivering reliable rechargeability, consistent power output, and the peace of mind that comes with factory-fresh components. Whether you need emergency standby power or a dependable cell for daily use, this high-performance battery offers a maintenance-free, spill-proof design and proven safety certifications to keep your equipment running smoothly.
Key Specifications
- Model Compatibility: National Battery C03A
- Battery Type: Rechargeable Sealed Lead Acid (SLA)
- Technology: Absorbent Glass Mat (AGM)
- Voltage: 12 Volts
- Capacity: 3.5 Ah
- Terminal Type: F1
- Brand: SigmasTek
- Design: Maintenance-Free, Spill Proof Construction
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
Benefits
This National Battery C03A replacement battery delivers long-lasting battery life through durable AGM construction and a maintenance-free sealed design. Its absorbent glass mat (AGM) technology improves vibrational resistance and reduces internal leakage risk, making it a rugged choice for both stationary and portable applications. As a high-performance battery, it provides steady voltage and reliable charge acceptance, ideal for devices that require consistent, repeatable power cycles.
The sealed, spill-proof construction means worry-free installation and safe operation in confined equipment housings. With U.L. recognition and CE certification, this replacement battery complies with key safety standards, helping protect sensitive electronics and connected systems. Typical applications include UPS systems, emergency lighting, alarm panels, medical devices, security systems, and portable tools — anywhere a dependable 12 Volt, 3.5 Ah SLA battery is required.
Choosing this National Battery C03A replacement ensures you receive a brand-new unit from SigmasTek that is built to perform. If you are searching for a replacement battery that balances reliability, performance, and value, this option delivers a long-lasting battery solution that stands up to daily demands and emergency use alike.
Ready to replace your C03A with a high-performance battery that you can trust? Add this National Battery C03A replacement to your cart now and secure reliable power backed by a 1 Year Warranty.
Technical Specifications
Product Highlights
- Brand Replacement : National Battery C03A
- Manufacturer: SigmasTek
- Product Type: SLA Batteries
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Payment & Security
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