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-3686

APC Back-UPS XS 900VA BX900R-CN UPS High Performance Replacement Battery Set 10.51 lb

24% off
New arrival
Sale price $53.99 USD Regular price $70.99
Shipping calculated at checkout.
Set of 2 SigmasTek SP12-7.5HR batteries (12V, 7.5 AH) for BX900R-CN
High rate discharge design for superior UPS backup power
Valve regulated, spill-proof construction for safe use
Low self-discharge retains charge during storage
Certified quality with 1 year warranty and OEM testing
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 APC BX900R-CN — SigmasTek SP12-7.5HR (2-Pack)

Upgrade your APC BX900R-CN Uninterruptible Power Supply with a reliable, high-performance replacement UPS battery set designed for consistent operation and dependable protection. This two-battery set is engineered for compatibility with the APC BX900R-CN, offering strong discharge capacity, low self-discharge characteristics, and robust construction to keep critical equipment running during outages. Whether you need an emergency power solution or a stable back-up for home or office electronics, this long-lasting battery option delivers the performance and reliability you expect from a premium replacement UPS battery.

Key Specifications

  • Included batteries: 2 x SigmasTek SP12-7.5HR
  • Voltage: 12 Volts
  • Capacity: 7.5 AH (amp-hours)
  • Terminal type: F2
  • Compatible UPS model: APC BX900R-CN (Back-UPS)
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof (sealed lead-acid)
  • Features: Low self-discharge, High vibration resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Installation note: Use all existing cables and hardware from original configuration to connect new batteries
  • Shipping note (in-stock): Orders typically shipped within 24 hours

Benefits

This replacement UPS battery set is built for durability and dependable operation. The valve regulated, spill-proof construction reduces maintenance and risk of leakage, while the high rate discharge design supplies the elevated power output required during short, high-demand events. For users seeking a high-performance UPS battery, these SigmasTek batteries are tested to meet or exceed OEM performance standards, giving you confidence in a long-lasting battery that performs when it counts.

Durability is reinforced by high vibration resistance, making these batteries suitable for both stationary UPS installations and environments where minor movement or vibration may occur. Low self-discharge helps retain capacity during storage, extending usable life and reducing the need for frequent recharging. This combination of features makes the set ideal for UPS units, emergency power supply applications, and battery-powered tools where reliable, immediate power is required.

Whether you manage a server closet, home office, or critical network equipment, replacing old batteries with this high-performance UPS battery set restores runtime and safeguards against data loss, unexpected shutdowns, and downtime. The SigmasTek SP12-7.5HR pair offers consistent voltage delivery and stable performance under load, delivering peace of mind during power interruptions.

Ready to replace the batteries in your APC BX900R-CN? Buy this trusted replacement UPS battery set today and enjoy fast shipping, a 1 year warranty, and long-lasting battery performance that protects your devices. Purchase now to restore full backup capability.

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 : APC Back-UPS
  • 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.