National C35U1 High Performance Replacement Battery 24.72 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 C35U1 High Performance 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
12 Volts | 35 AH
Terminal Type
Nut & Bolt
Replacement National Battery C35U1 — Compatible with C35U1
If your equipment calls for the National Battery C35U1, this replacement battery delivers the compatibility and dependable performance you expect. Built using Absorbent Glass Mat (AGM) technology and a maintenance-free, spill-proof design, this battery is engineered to meet or exceed OEM SLA specifications for reliable operation. You get a brand new, factory-fresh unit designed for the long haul.
Key Specifications
- Compatible Model: National Battery C35U1
- Brand: SigmasTek
- Voltage: 12 Volts
- Capacity: 35 AH
- Technology: Absorbent Glass Mat (AGM)
- Design: Maintenance-Free with Spill Proof Construction
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
- Terminals: Nut & Bolt
Benefits
This C35U1 replacement battery is a high-performance battery option that balances safety, longevity, and dependable output. AGM technology ensures low self-discharge and consistent recharge behavior, while the sealed, maintenance-free design makes installation straightforward and reduces the need for routine servicing.
- Durability: Designed to endure repeated cycles and daily use, providing stable, reliable power over time.
- Long Life: Optimized for extended service life, making it a true long-lasting battery for both professional and consumer applications.
- High Performance: Stable voltage under load supports sensitive electronics and critical backup systems.
- Compliance & Safety: U.L. recognized and CE certified to meet safety expectations across commercial and residential environments.
- Typical Applications: Ideal for UPS systems, emergency backup power, security and alarm equipment, medical devices, mobility and recreational equipment, and electric tools requiring SLA power.
Ready to replace your old C35U1? Order this replacement battery now for dependable performance and a one-year warranty — get your equipment back to full power today.
Technical Specifications
Product Highlights
- Brand Replacement : National Battery C35U1
- 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.
