Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com

WELCOME5
SigmasTek  |  SKU: BW-3146

Alpha Technologies Nexsys 1250E UPS Compatible Replacement Battery Set 21.02 lb

25% off
New arrival
Sale price $105.99 USD Regular price $141.99
Shipping calculated at checkout.
Replacement battery set with 4 SigmasTek SP12-7.5HR batteries (12V, 7.5 AH)
Engineered for high power output over short durations in UPS systems
Spill-proof valve regulated construction reduces maintenance needs
Low self-discharge and vibration resistance for extended reliability
Certified to UL and CE standards, includes 1-year warranty
In stock

— Ready to ship immediately

Free shipping

Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe

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.

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

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

🔹 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: 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 | 7.5 Ah

Terminal Type

F2

Replacement SigmasTek SP12-7.5HR for Alpha Technologies Nexsys 1250E UPS

This premium replacement UPS battery set is engineered specifically for the Alpha Technologies Nexsys 1250E, delivering reliable performance and rapid discharge capability when your system needs it most. Each set includes four SigmasTek SP12-7.5HR batteries (12 Volts, 7.5 AH) designed for seamless integration with your existing Nexsys 1250E hardware—please reuse the original cables and mounting hardware for proper installation. If you are searching for a replacement UPS battery that balances high-performance UPS battery output with dependable, long-lasting battery life, this kit is built to meet those needs and keep your critical equipment protected.

Key Specifications

  • Battery model: SigmasTek SP12-7.5HR
  • Quantity: 4 batteries per set
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Terminal type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof
  • Features: Low Self-discharge; High Vibration Resistance
  • Certifications: U.L. Recognized; CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible UPS model: Alpha Technologies Nexsys 1250E

Benefits

Replace your depleted cells with a high-performance UPS battery solution designed for demanding, short-duration, high-rate discharge scenarios. These SigmasTek batteries feature valve regulated, spill-proof construction and low self-discharge, so they remain ready for action after storage and deliver consistent voltage under load. High vibration resistance and U.L. and CE certifications mean the set can withstand common environmental stresses and meets recognized safety standards.

As a long-lasting battery option for your Nexsys 1250E, this replacement UPS battery set provides superior performance in uninterruptible power supply (UPS) units, emergency power supply systems, and battery-powered tools. Whether you manage data center equipment, telecom gear, or critical control systems, this kit delivers stable backup power and fast discharge capability when you need short bursts of higher output. Technically tested to meet or exceed OEM specifications, the batteries are a reliable, cost-effective alternative to factory-original packs.

Customer-focused features include brand-new, factory-fresh cells and a 1 year warranty for added peace of mind. Orders for in-stock items typically ship within 24 hours, so you can restore redundancy quickly and minimize downtime.

Ready to upgrade your Alpha Technologies Nexsys 1250E with a proven replacement UPS battery set? Purchase now to secure a high-performance UPS battery solution and enjoy reliable, long-lasting battery backup for your critical systems.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)21.0

Product Highlights

  • Brand Replacement : Alpha Technologies
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.