Best Power LI 1050 (Fortress Rack Mount) UPS High Performance Replacement Battery Set 17.99 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.
Best Power LI 1050 (Fortress Rack Mount) UPS High Performance Replacement Battery Set 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 | 9 AH
Terminal Type
F2
Replacement Battery Set for Best Power LI 1050 (Fortress Rack Mount)
Restore full backup capability to your Best Power LI 1050 (Fortress Rack Mount) with this premium replacement UPS battery set. Engineered to deliver consistent, safe power under demanding conditions, this factory-fresh replacement provides dependable runtime and the high-rate discharge performance necessary for rack-mounted UPS units. Choose this high-performance UPS battery when you need a reliable and long-lasting battery solution for your Best Power LI 1050 (Fortress Rack Mount).
Key Specifications
- Included Batteries: 3 x SigmasTek SP12-9HR
- Voltage: 12 Volts
- Capacity: 9 AH (Amp-hours)
- Battery Model: SP12-9HR
- Brand: SigmasTek
- Design: High Rate Discharge Design
- Construction: Valve Regulated Spill Proof
- Features: Low Self-discharge
- Durability: High Vibration Resistance
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
- Compatibility: Best Power LI 1050 (Fortress Rack Mount)
- Note: Requires use of existing cables and hardware from the original UPS configuration
Benefits
- Durability: Constructed with high vibration resistance and valve-regulated, spill-proof design to endure rack mount environments and transportation stresses.
- Long Life: Low self-discharge characteristics contribute to extended shelf life and reliable standby performance—making this a long-lasting battery for scheduled maintenance plans.
- High Performance: High rate discharge capability supports moments of elevated power draw, so your UPS can sustain critical loads during outages.
- Quality and Safety: U.L. recognition and CE certification provide assurance that the product meets established safety and performance standards.
- OEM-level Reliability: Our technical team tests every replacement UPS battery set to ensure compatibility and performance equal to or better than the original batteries for Best Power LI 1050 (Fortress Rack Mount).
- Applications: Ideal for Uninterruptible Power Supply units, emergency backup systems, and battery-powered tools that demand reliable short-term power bursts.
- Easy Integration: Designed to work with the original UPS hardware—simply reuse your existing cables and mounting components for straightforward installation.
Protect your equipment and restore trusted backup power—order this replacement UPS battery set for the Best Power LI 1050 (Fortress Rack Mount) today. Secure a high-performance UPS battery and long-lasting battery solution backed by a 1 year warranty and fast shipping.
Technical Specifications
Product Highlights
- Brand Replacement : Best Power
- Manufacturer: SigmasTek
- Product Type: UPS 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.




