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SigmasTek  |  SKU: BW-4921

BS Battery UPS12-3.5 High Performance Replacement Battery 2.98 lb

19% off
New arrival
Sale price $28.99 USD Regular price $35.99
Shipping calculated at checkout.
Compatible replacement for BS Battery UPS12-3.5 model
Brand new, factory fresh sealed lead acid battery
Meets or exceeds OEM SLA battery specifications
Includes minimum one year warranty and UL listing
Ships within 24 hours, in stock for fast delivery
In stock

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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.


Volts & Amps

12 Volts | 3.5 Ah

Terminal Type

F2

SigmasTek Replacement for BS Battery UPS12-3.5 — Compatible with BS Battery UPS12-3.5

This SigmasTek replacement UPS battery is engineered specifically for the BS Battery UPS12-3.5, delivering dependable compatibility, strong performance, and proven reliability. As a brand new, factory-fresh rechargeable sealed lead acid (SLA) unit, it meets or exceeds OEM SLA battery specifications and provides a practical, cost-effective way to restore your UPS to like-new operation. If you need a long-lasting battery that safeguards critical equipment, this replacement UPS battery is a trusted choice.

Key Specifications

  • Compatible UPS Model: BS Battery UPS12-3.5
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 3.5 Ah
  • Chemistry: Rechargeable Sealed Lead Acid (SLA)
  • Terminal Type: F2
  • Certification: UL listed
  • Condition: Brand New, Factory Fresh
  • Warranty: Minimum 1 Year Warranty
  • Meets/Exceeds: OEM SLA battery specifications
  • Shipping: In stock and typically shipped within 24 hours

Benefits

Designed for durability and consistent power delivery, this high-performance UPS battery provides the long service life and high discharge capability you expect from premium replacements. The rechargeable sealed lead acid design reduces maintenance and prevents spills, while UL listing verifies safety and manufacturing quality. Whether you are replacing an old battery in a home office UPS, supporting emergency power systems, or keeping battery-powered tools ready for use, this long-lasting battery gives you reliable runtime and peace of mind.

Users will appreciate the dependable voltage stability during critical shutdowns and the reduced self-discharge that helps preserve capacity between uses. As a true replacement UPS battery for the BS Battery UPS12-3.5, it delivers consistent, high-performance UPS support and helps extend the life of your UPS unit without sacrificing safety or reliability.

For assistance in selecting the correct BS Battery replacement SLA battery, our customer service team is available at 1 or by email. We guarantee 100% compatibility with your BS Battery UPS12-3.5 model and the best price on the market.

Ready to upgrade? Buy your BS Battery UPS12-3.5 replacement battery with confidence today — get a high-performance UPS battery and a long-lasting battery solution shipped quickly.

Technical Specifications

Voltage12 Volts
Amp Hours3.5 Ah
Terminal TypeF2
Length (in.)5.24
Width (in.)2.64
Height (in.)2.36
Weight (lb.)2.98

Product Highlights

  • Brand Replacement : BS Battery
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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