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SigmasTek  |  SKU: BW-5791

Alarmnet 7845C High Performance Replacement Battery 1.65 lb

26% off
Sale price $30.99 USD Regular price $41.99
Shipping calculated at checkout.
Compact size: 3.78 x 0.98 x 2.44 inches
Reliable 12-volt power supply
Lightweight at 1.65 lbs for easy handling
0.8 Ah capacity ensures consistent performance
Compatible replacement for Alarmnet brand products
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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 | 0.8 Ah

Terminal Type

Special Connector

12V 0.8Ah Replacement Battery — Compatible with Alarmnet (SigmasTek)

This 12V 0.8Ah replacement battery is engineered for dependable compatibility with Alarmnet devices and other security equipment that require compact, trustworthy backup power. Built by SigmasTek to match the form factor and electrical characteristics of the original, this long-lasting battery offers stable performance for alarm systems, sensors, and small standby applications. If you need a reliable, maintenance-free replacement battery for your Alarmnet-compatible unit, this high-performance battery delivers value and consistency.

Key Specifications

  • Manufacturer: SigmasTek
  • Brand Replacement: Alarmnet
  • Voltage: 12 Volts
  • Amp Hours: 0.8 Ah
  • Length: 3.78 inches
  • Width: 0.98 inches
  • Height: 2.44 inches
  • Weight: 1.65 lb

Benefits

As a replacement battery designed specifically for Alarmnet-compatible equipment, this cell offers dependable standby power in a compact package. The battery’s construction focuses on high performance in small dimensions, delivering expectations of long life and reliable discharge performance when systems require backup energy. It’s an ideal long-lasting battery for alarm panels, security sensors, emergency lighting circuits, and other low-current standby roles where a compact footprint is required.

Durability is built into the design to withstand repeated charge cycles while minimizing maintenance; this makes installation and long-term ownership simple for both homeowners and service technicians. Although compact, it functions as a high-performance battery for short-duration discharges and steady trickle charge scenarios commonly seen in monitoring systems. Typical applications include UPS monitoring modules, emergency notification devices, security controllers, and portable test tools where a compact 12V backup source is needed.

Installing this replacement battery is straightforward — confirm dimensions and polarity against your existing battery to ensure a correct match. The SigmasTek-made unit is intended to meet or exceed original specifications so you can restore your system quickly and confidently.

Ready to replace your Alarmnet battery? Add this long-lasting, high-performance battery to your cart now to maintain uninterrupted protection and system readiness.

Technical Specifications

Voltage12 Volts
Amp Hours0.8 Ah
Terminal TypeSpecial Connector
Length (in.)3.78
Width (in.)0.98
Height (in.)2.44
Weight (lb.)1.65

Product Highlights

  • Brand Replacement : Alarmnet 7845C Battery
  • Manufacturer: SigmasTek
  • Product Type: Security Alarm
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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