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SigmasTek  |  SKU: BW-5678

Simplex 4005/4009/4008/4006 12V 12Ah Compatible Replacement Battery - 2 Pack 14.51 lb

14% off
Sale price $81.99 USD Regular price $94.99
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Direct replacement for Simplex 4005, 4009, 4008, and 4006 alarm systems
Meets or exceeds OEM specifications for reliable performance
Provides consistent and dependable power to critical safety systems
Maintenance-free, sealed design for hassle-free use
Includes two batteries for easy replacement and backup
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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.

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Volts & Amps

12 Volts | 12 Ah

Terminal Type

F2

2-Pack 12V 12Ah Replacement Battery for Simplex 4005 / 4009 / 4008 / 4006 Alarm Systems

Maintain uninterrupted protection for your Simplex alarm panels with this 2-pack of 12V 12Ah replacement batteries. Engineered as a direct replacement for Simplex models 4005, 4009, 4008, and 4006, these sealed, maintenance-free batteries meet or exceed OEM specifications to provide dependable power when it matters most. Compact, durable, and easy to install, this high-performance battery pair is perfect for both routine maintenance and emergency replacement.

Key Specifications

  • Compatible Models: Simplex 4005, 4009, 4008, 4006
  • Pack Quantity: 2-pack
  • Voltage: 12 Volts
  • Capacity: 12 Ah
  • Terminal Type: F2
  • Brand: SigmasTek
  • Battery Type: Sealed and maintenance-free
  • Meets/Exceeds: OEM specifications for reliable performance

Benefits

These replacement batteries deliver a dependable, long-lasting battery solution for Simplex alarm panels and other backup applications. The 12Ah capacity offers sufficient runtime for standard alarm functions and short-term emergency power needs. With sealed construction, these batteries require no maintenance and resist corrosion and spillage, which is especially important inside enclosed alarm cabinets.

Durability: Designed for consistent performance under load, these batteries are built to withstand the demands of daily readiness. The F2 terminal provides secure electrical connections for reliable operation and simplified replacement procedures. As a high-performance battery choice, they ensure that your alarm panels retain the power needed for signaling, notification, and monitoring during outages.

Typical applications include emergency backup for Simplex fire and security systems (models 4005, 4009, 4008, 4006), UPS units, access control systems, emergency lighting circuits, and other standby power installations. The two-pack offers convenience for scheduled maintenance cycles and provides a spare set for rapid swaps when time is critical.

Replace worn or aging cells with confidence — purchase this 2-pack of 12V 12Ah replacement batteries today to keep your Simplex systems protected and performing at their best.

Technical Specifications

Voltage12 Volts
Amp Hours12 Ah
Terminal TypeF2
Length (in.)5.95
Width (in.)3.86
Height (in.)3.7
Weight (lb.)14.5

Product Highlights

  • Brand Replacement : 12V 12AH Replacement
  • Manufacturer: SigmasTek
  • Product Type: Security Alarm
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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