Unipower B11128 F1 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.
Unipower B11128 F1 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 | 3.5 Ah
Terminal Type
F1
Unipower B11128 F1 Battery Replacement
Restore the performance of your Unipower B11128 F1 with this reliable replacement battery, engineered for compatibility, consistent performance, and long-term dependability. This high-performance battery uses AGM technology to offer maintenance-free, spill-proof power, making it an ideal long-lasting battery for a variety of critical applications where uptime matters.
Key Specifications
- Model Compatibility: Unipower B11128 F1
- Brand: SigmasTek
- Voltage: 12 Volts
- Capacity: 3.5 Ah
- Terminal Type: F1
- Battery Type: Sealed Lead Acid (SLA)
- 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
Benefits
Designed for resilience, this replacement battery delivers durability and a long service life. The AGM construction enhances resistance to vibration and improves charge/discharge efficiency for sustained performance over many cycles. As a high-performance battery, it provides stable, reliable output suited to sensitive electronics and backup systems.
The maintenance-free and spill-proof features make this battery easy to install and safe to handle without the need for periodic topping up. U.L. recognition and CE certification confirm that this product meets established safety and quality standards, giving you confidence in both safety and reliability.
Common applications include UPS backup, emergency lighting and power, security and alarm systems, medical device backup, and portable tools that depend on consistent 12V power. The F1 terminal offers secure and compatible connections, enabling quick replacement and minimal downtime.
Keep your Unipower B11128 F1 system operating at peak performance with this long-lasting, high-performance replacement battery. With a 1 Year Warranty and brand new condition, it’s a smart and economical choice—purchase today to ensure reliable power.
Technical Specifications
Product Highlights
- Brand Replacement : Unipower B11128 F1
- 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.




