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-4139

Best Power Patriot SPI400 UPS High Performance Replacement Battery 5.25 lb

11% off
New arrival
Sale price $33.99 USD Regular price $37.99
Shipping calculated at checkout.
AGM technology delivering consistent, reliable power
High rate discharge for UPS and battery-powered tools
Maintenance-free design with spill-proof construction
U.L. recognized and CE certified for safety and quality
Brand new, factory fresh with 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 Best Power Patriot SPI400 - Compatible UPS Model: Best Power Patriot SPI400

Restore dependable backup power to your Best Power Patriot SPI400 with this compatible replacement UPS battery. Built to meet or exceed the original SLA specifications, this unit ensures reliable performance and compatibility so your UPS can protect critical devices during outages. Ideal for office, retail, and home applications, this battery brings back consistent runtime and peace of mind.

Key Specifications

  • Technology: Absorbent Glass Mat (AGM) Technology
  • Design: High Rate Discharge Design
  • Maintenance: Maintenance-Free Design with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 7.5 Ah
  • Terminal Type: F2
  • Compatible OEM: Best Power (Patriot SPI400)

Benefits

Designed for reliability and longevity, this long-lasting battery uses AGM construction to provide a sealed, maintenance-free power source that resists vibration and leakage. The high rate discharge design supports demanding UPS loads, delivering the surge capacity necessary to keep critical equipment running during blackouts. As a high-performance UPS battery, it offers consistent voltage regulation and quick recharge capability to minimize downtime between events.

The unit is U.L. recognized and CE certified, reflecting adherence to safety and quality standards. Its spill-proof design and factory-fresh condition mean you receive a dependable drop-in replacement that requires no special maintenance. Typical uses include UPS backup systems, emergency power for communications and computing equipment, and battery-powered tools that need a reliable 12V/7.5Ah power source. The maintenance-free nature and trusted certification make it ideal for both business and residential installations.

With a one-year warranty and construction tailored for UPS applications, this replacement UPS battery for the Best Power Patriot SPI400 is a practical investment in uninterrupted protection.

Replace your old battery today — buy this replacement UPS battery for the Best Power Patriot SPI400 now and restore reliable backup power to your system.

Technical Specifications

Voltage12 Volts
Amp Hours7.5 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)5.25

Product Highlights

  • Brand Replacement : Best Power
  • 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.