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SigmasTek  |  SKU: BW-6225

Napco Alarms GEM-P816 (12v 5ah) High Capacity Alarm Replacement Battery 3.5 lb

9% off
Sale price $29.99 USD Regular price $32.99
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Meets or exceeds original OEM specifications for reliable performance
Valve regulated, spill-proof design for safe, maintenance-free use
U.L. Recognized and CE Certified for guaranteed quality and safety
Durable rugged plastic case ensures long-lasting protection
Includes 1 brand new, factory fresh 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 | 5 AH

Terminal Type

F1

SP12-5 Replacement Battery for Napco Alarms GEM-P816 (12V 5Ah)

This high-quality replacement battery is specifically compatible with the Napco Alarms GEM-P816 system, offering reliable performance and safety for your home or business security equipment. Designed to meet or exceed the original OEM specifications, the SP12-5 (12 V 5 AH) provides dependable standby power, fast recharge characteristics, and consistent voltage for the duration of its service life. If you need a dependable, long-lasting battery for your GEM-P816, this option delivers the durability and reliability required for mission-critical alarm systems.

Key Specifications

  • Compatible Model: Napco Alarms GEM-P816
  • Included: 1 battery - SP12-5 (12 V 5 AH)
  • Voltage: 12 Volts
  • Capacity: 5 AH (Amp-hours)
  • Construction: Valve Regulated Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Performance: Superior Performance Guaranteed
  • Case: Rugged Plastic Case And Cover
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Applications: Access Control Systems, Home Alarm Systems, Burglar Alarm Systems, Security Systems, Power Supplies

Benefits

The SP12-5 is engineered to be a high-performance battery and a recommended replacement battery for Napco Alarms GEM-P816 users. Its valve regulated, spill-proof design prevents leaks and simplifies installation and maintenance, while the rugged plastic case provides impact resistance for field and installer handling. As a long-lasting battery solution, it offers stable discharge characteristics that extend service intervals and provide dependable emergency power when you need it most.

Expect prolonged cycle life and consistent recharge acceptance—qualities that make this a true high-performance battery for alarm panels, access control systems, and other security infrastructure. Typical applications include alarm and burglar systems, access control panels, security power supplies, and emergency backup circuits. It also performs well in UPS modules and other emergency power scenarios where a long-lasting battery is essential.

Choosing this SP12-5 replacement battery gives you a combination of proven construction, manufacturer-backed certification, and the confidence of a one-year warranty. If you require a reliable, long-life power source for your GEM-P816, this is a practical, cost-effective solution.

Ready to secure uninterrupted protection? Buy the SP12-5 replacement battery for your Napco Alarms GEM-P816 today and take advantage of fast shipping and trusted performance.

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 : Napco Alarms GEM-P816
  • Manufacturer: SigmasTek
  • Product Type: Security Alarm
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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