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-11815

Sonnenschein S825I High Performance Replacement Battery 1.37 lb

24% off
Sale price $34.99 USD Regular price $45.99
Shipping calculated at checkout.
Meets or exceeds OEM specifications for Sonnenschein S825I compatibility
Absorbent Glass Mat (AGM) technology for reliable, spill-proof performance
Maintenance-free design ensures hassle-free use and long service life
U.L. Recognized and CE Certified for safety and quality assurance
Includes 1-year warranty and factory-fresh condition for peace of mind
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

6 Volts | 3 Ah

Terminal Type

F1

Sonnenschein S825I Replacement Battery — Compatible with Sonnenschein S825I

Replace your worn battery with a dependable Sonnenschein S825I replacement battery designed for emergency lighting and critical standby systems. This replacement battery delivers consistent performance, reliable recharge characteristics, and the peace of mind that comes with factory-fresh construction. Whether you need a replacement battery for emergency lighting, alarms, or medical devices, the Sonnenschein S825I (SigmasTek) offers compatibility and dependable power when it counts.

Key Specifications

  • Model Compatibility: Sonnenschein S825I
  • Replacement Brand: SigmasTek
  • Battery Type / Technology: Absorbent Glass Mat (AGM) Technology
  • Voltage: 6 Volts
  • Capacity: 3 Ah
  • Terminal Type: F1
  • Design: Maintenance-Free
  • Construction: Spill Proof
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Meets/Exceeds: OEM SLA battery specifications

Benefits

Built with AGM technology, this Sonnenschein S825I replacement battery delivers a high-performance battery solution that is maintenance-free and spill proof. The sealed design reduces the risk of leaks and corrosion, providing enhanced durability in demanding environments. As a long-lasting battery option, it resists deep discharge damage and supports repeated charge cycles for reliable standby use.

Ideal for emergency lighting systems, security and fire alarms, and medical equipment, this replacement battery supports critical applications where uninterrupted power matters. Its UL recognition and CE certification confirm compliance with key safety standards, and the brand-new, factory-fresh construction ensures you receive a product with optimal shelf life. The 1 year warranty adds an extra layer of protection and confidence in your purchase.

If you need a high-performance battery that matches Sonnenschein S825I specifications precisely, this SigmasTek replacement is engineered for compatibility and performance. Use it in UPS setups, emergency lighting arrays, alarm panels, and other systems that rely on dependable standby power.

Ready to replace your battery? Choose this Sonnenschein S825I replacement battery now for a reliable, long-lasting battery solution that keeps your critical systems up and running. Purchase today to secure dependable emergency power.

Technical Specifications

Voltage6 Volts
Amp Hours3 Ah
Terminal TypeF1
Length (in.)4.92
Width (in.)1.34
Height (in.)2.35
Weight (lb.)1.37

Product Highlights

  • Brand Replacement : Sonnenschein S825I Battery
  • Manufacturer: SigmasTek
  • Product Type: Emergency Power
  • 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.