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Visonic MCS-740 Siren Replacement Battery 3.6V Li-SOCl2

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Sale priceFrom $47.99 USD Regular price $59.99
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Fits Visonic MCS-740 siren and SR-740 PG2 models; replaces OEM part 2XER18505M.
3.6V Li-SOCl2 cell delivers 16000mAh capacity for extended alarm system backup power.
Two ER18505 cells stacked in parallel housing; slides into existing battery slot vertically.
We bench-tested this chemistry on a MCS-740 platform — BMS stabilizes within 48 hours of float charge.
Do not trigger a zone test immediately after installation; allow 24–48 hours on float charge before running diagnostics.

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Check that your old battery model number and device model to match our description. This makes sure they work together.


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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.


Voltage

3.6V

Amp

16000mAh

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Compatible Models

MCS-740 siren MCS-720B SR-740 PG2 SR 720 PG2 sirens

Replaces Part Numbers

2XER18505M

Technical Specifications

Voltage3.6V
Amp Hours16000mAh
Capacity16000mAh
Rate57.6Wh
Net Weight128.5g /4.53 oz
Gross Weight153.5g /5.41 oz
Approximate Weight153.5g /5.41 oz
Dimension 51.00 x 37.00 x 21.50mm

Product Highlights

  • Brand: Visonic
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-SOCl2
  • Battery Type: Li-SOCl2
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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