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SigmasTek  |  SKU: BW-6291

ADT Security B4520638 High Performance Compatible Replacement Battery for Alarm Systems 29.14 lb

21% off
Sale price $150.99 USD Regular price $189.99
Shipping calculated at checkout.
Meets or exceeds original OEM specifications for reliable performance
Valve regulated, spill-proof design for safe indoor use
U.L. recognized and CE certified for quality assurance
Rugged plastic case ensures durability and long-lasting protection
Includes 1 brand new, factory fresh 12V 40AH battery with 1-year warranty
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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

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


Volts & Amps

12 Volts | 40 Ah

Terminal Type

Nut & Bolt

ADT Security B4520638 Replacement Battery - SP12-40 NB (Compatible with B4520638)

Ensure uninterrupted protection for your ADT Security B4520638 system with this premium replacement battery. The SP12-40 NB (12 V 40 AH) is engineered to meet or exceed OEM specifications, delivering dependable reserve power, consistent recharging performance, and rugged reliability for residential and commercial installations. If you need a high-performance battery that keeps your security system ready when it matters most, this B4520638-compatible solution is an excellent choice.

Key Specifications

  • Compatible Model: ADT Security B4520638
  • Included Battery: 1 × SP12-40 NB
  • Voltage: 12 Volts
  • Capacity: 40 AH
  • Terminal Type: Nut & Bolt
  • Construction: Valve Regulated Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Case: Rugged Plastic Case and Cover
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek

Benefits

This replacement battery delivers robust performance and extended service life for demanding standby and cyclic applications. The SP12-40 NB’s valve regulated, spill-proof design and reinforced case provide superior durability and safe operation in alarm panels, power supply cabinets, and equipment racks. As a high-performance battery rated for 40 AH, it supplies ample reserve capacity for prolonged outage periods and frequent load demands, translating to a long-lasting battery solution that reduces maintenance cycles.

Ideal uses include home alarm systems, commercial burglar and security systems, access control, and larger power supply applications where extended runtime is required. The same reliability also makes it suitable for UPS systems, emergency power setups, and auxiliary power for field tools and equipment. The nut & bolt terminal configuration ensures secure connections in installations where vibration or movement could otherwise loosen push-on terminals.

Certified to U.L. and CE standards and sold factory fresh with a 1 year warranty, this ADT-compatible battery is backed by quality assurance and customer support. It’s manufactured to match OEM performance while offering a cost-effective alternative to original branded units.

Protect your ADT Security B4520638 system with a trusted, high-performance replacement battery. Add the SP12-40 NB to your cart now and enjoy reliable backup power when you need it most.

Technical Specifications

Voltage12 Volts
Amp Hours40 Ah
Terminal TypeNut & Bolt
Length (in.)7.76
Width (in.)6.5
Height (in.)6.69
Weight (lb.)29.11

Product Highlights

  • Brand Replacement : ADT Security B4520638
  • Manufacturer: SigmasTek
  • Product Type: Security Alarm
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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