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SigmasTek  |  SKU: BW-15613

BSB GB12-4.2 High Performance Replacement Battery 3.5 lb

17% off
Sale price $29.99 USD Regular price $35.99
Shipping calculated at checkout.
Meets or exceeds OEM SLA battery specifications
Absorbent Glass Mat (AGM) technology for reliable performance
Maintenance-free and spill-proof design for safety and convenience
U.L. Recognized and CE Certified for quality assurance
Brand new with a 1-year warranty for peace of mind
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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 | 5 AH

Terminal Type

F1

BSB GB12-4.2 Battery (Replacement) — Compatible with BSB GB12-4.2

This replacement battery for the BSB GB12-4.2 delivers reliable compatibility, consistent performance, and proven reliability for your critical power needs. Designed as a drop-in Rechargeable Sealed Lead Acid (SLA) replacement, the BSB GB12-4.2 model provides maintenance-free operation and dependable energy storage whether you’re powering backup systems, emergency lighting, or portable equipment. If you need a high-quality replacement battery that meets or exceeds OEM specifications, this long-lasting battery is engineered to give you peace of mind and steady power day after day.

Key Specifications

  • Model: BSB GB12-4.2 (Replacement)
  • Battery Type: Rechargeable Sealed Lead Acid (SLA)
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Design: Maintenance-Free Design with Spill Proof Construction
  • Certification: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Voltage: 12 Volts
  • Capacity: 5 AH
  • Terminal: F1
  • Brand: SigmasTek
  • Warranty: 1 Year Warranty

Benefits

Built with AGM construction, this replacement battery combines safety and performance to deliver a resilient power source that is optimized for frequent charge and discharge cycles. The sealed, spill-proof design eliminates leakage risks and reduces maintenance overhead, making it ideal for installations where reliability and cleanliness matter. As a high-performance battery, the BSB GB12-4.2 replacement offers strong discharge performance and low self-discharge for dependable standby readiness.

Expect a long-lasting battery experience thanks to factory-fresh cells and quality control that ensures consistent output. Its rugged construction and certified components (U.L. recognized and CE certified) make it suitable for a wide range of applications: UPS systems, emergency lighting and alarm systems, medical devices that require standby power, telecom equipment, and portable power tools. Whether used in stationary backup applications or mobile equipment, this battery provides the steady voltage and capacity you need.

Because it meets or exceeds OEM SLA specifications, the BSB GB12-4.2 replacement battery is an excellent choice for technicians, facility managers, and homeowners looking for a dependable, affordable replacement battery solution. The combination of AGM technology, maintenance-free operation, and certified safety ensures you get both performance and peace of mind.

Ready to upgrade your power system with a trusted, long-lasting battery? Add this BSB GB12-4.2 replacement battery to your cart now — secure your high-performance battery today and enjoy reliable backup power backed by a 1 Year Warranty.

Technical Specifications

Voltage12 Volts
Amp Hours5 AH
Terminal TypeF1
Length (in.)3.54
Width (in.)2.76
Height (in.)3.98
Weight (lb.)3.5

Product Highlights

  • Brand Replacement : BSB GB12-4.2 Battery
  • Manufacturer: SigmasTek
  • Product Type: SLA Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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