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-4802

Alpha Technologies CFR 4000 UPS High Performance Replacement Battery Set 98.89 lb

10% off
New arrival
Sale price $459.99 USD Regular price $509.99
Shipping calculated at checkout.
Includes 4 brand new SigmasTek SP12-35 NB batteries (12V, 35 AH)
High rate discharge design delivers quick bursts of high power when needed
Valve regulated, spill-proof design ensures safe operation without leaks
Low self-discharge extends battery life during storage and use
Certified by U.L. and CE with a 1-year warranty for quality assurance
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 | 35 AH

Terminal Type

Nut & Bolt

Replacement Battery Set for Alpha Technologies CFR 4000

Restore reliable backup power to your Alpha Technologies CFR 4000 UPS with this precision-matched replacement battery set. Engineered for compatibility and consistent performance, the kit contains four SigmasTek SP12-35 NB batteries that deliver the power density and rapid discharge capability your CFR 4000 requires. Whether you maintain data center racks, network closets, or critical telecom infrastructure, this replacement UPS battery pack provides the dependable operation you expect.

Key Specifications

  • Battery Quantity: 4 batteries per set
  • Battery Model: SigmasTek SP12-35 NB
  • Voltage: 12 Volts
  • Capacity: 35 AH (Ampere-hours)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Self-discharge: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible Brand: Alpha Technologies
  • Compatible UPS Model: CFR 4000

Benefits

  • Robust valve-regulated, spill-proof design minimizes maintenance and improves safety compared to open-cell batteries. This enhances long-term reliability for systems relying on a long-lasting battery backup.
  • The high rate discharge architecture provides the sudden current delivery needed for brief, high-demand events. As a high-performance UPS battery, it helps keep your equipment online through surges and short outages.
  • Low self-discharge preserves stored energy during idle periods, ensuring the replacement UPS battery remains ready to support critical loads without frequent recharging.
  • High vibration resistance and trusted certifications (U.L., CE) make these batteries suitable for rack-mounted UPS systems and installations where mechanical stresses occur.
  • Ideal uses include Uninterruptible Power Supply units like the Alpha Technologies CFR 4000, emergency power systems for alarms and lighting, and battery-powered tools requiring short bursts of high current. Each set is tested to meet or exceed OEM specifications for dependable field performance.

These batteries ship brand new and factory fresh—be sure to reuse your existing cables and hardware from the original configuration when installing this replacement kit. For facilities seeking a reliable, replacement UPS battery that balances performance and value, this SigmasTek set is an excellent choice.

Purchase your replacement batteries for the Alpha Technologies CFR 4000 today to secure high-performance UPS backup, prompt shipping, and a 1 year warranty on a trusted long-lasting battery solution.

Technical Specifications

Voltage12 Volts
Amp Hours35 AH
Terminal TypeNut & Bolt
Length (in.)7.72
Width (in.)5.14
Height (in.)6.22
Weight (lb.)98.8

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.