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-3715

Alpha Technologies ALI Plus 800 High Performance UPS Replacement Battery Set 10.51 lb

25% off
New arrival
Sale price $53.99 USD Regular price $71.99
Shipping calculated at checkout.
Two brand new 12V 7.5 AH SigmasTek replacement batteries included
Designed for high rate discharge UPS and emergency power use
Valve regulated, spill-proof, and maintenance free
Certified for safety and performance with U.L. and CE marks
Comes with a 1-year warranty for reliable service
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 Battery Set for Alpha Technologies ALI Plus 800 UPS

Upgrade the backup power in your Alpha Technologies ALI Plus 800 with this reliable replacement battery set. Each package includes two SigmasTek SP12-7.5HR batteries (12 Volts, 7.5 AH) crafted for high rate discharge performance and dependable cycle life. If you’re looking for a long-lasting battery solution that restores runtime and safeguards critical systems, this replacement UPS battery set is engineered to meet those needs.

Key Specifications

  • Compatible UPS Model: Alpha Technologies ALI Plus 800
  • Battery Model: SigmasTek SP12-7.5HR
  • Quantity: 2 batteries per set
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

These batteries offer robust durability and dependable performance for UPS installations. The high rate discharge design ensures sufficient peak current delivery for brief, demanding loads, while the valve-regulated, spill-proof build reduces maintenance requirements and improves safety. Low self-discharge helps retain stored energy during periods of inactivity, delivering readiness when power interruptions occur. As a high-performance UPS battery option, this set provides consistent output and long-term value.

Ideal for use in the ALI Plus 800, these batteries are also suited for emergency power systems and battery-powered tools that require short-duration power bursts. The components are U.L. recognized and CE certified, and each battery set is factory fresh and tested to meet or exceed OEM performance standards. Backed by a 1 year warranty, this replacement pack brings confidence to your backup power strategy.

Note: installation requires reuse of existing cables and hardware from your original ALI Plus 800 setup. For assistance, contact our customer service team at . Most in-stock orders ship within 24 hours to minimize downtime.

Don’t let depleted batteries compromise your backup system — buy this long-lasting, high-performance replacement UPS battery set for the Alpha Technologies ALI Plus 800 today and keep your critical systems protected.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)10.5

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.