3.6 V 3,500 mAh lithium batteries for Visonic MCS-740 siren – Pack of 2

3.6 V lithium batteries for Visonic MCS-740 siren – pack of 2

This pack of 2 3.6 V lithium battery packs is intended to replace the power supply for Visonic sirens compatible with references 103-304742 and 2XER18505M. Each pack is an independent module with its own connector. This pack of 2 packs is suitable for installations using this assembly. The product offered is a generic alternative to the original reference, not a Visonic brand part.

Technical specifications

• Brand: Generic
• Technology: Lithium thionyl chloride (Li-SOCl₂), non-rechargeable
• Voltage: 3.6 V per module
• Capacity: 3,500 mAh (3.5 Ah) per module
• Format: Module assembled on ER18505M cells
• Dimensions: 51 × 36 × 19 mm per module
• Connection: Mounted connector
• Packaging: Pack of 2 packs

Compatibility with Visonic sirens

This siren battery family is associated with the PowerMax MCS-740, MCS-730, SR-740 PG2 and SR-720B PG2 models. The presence of a device name in a list does not preclude the need to check the exact model, its generation and the reference of its power module. Mounting or wiring versions may vary.

Visonic documentation mentions four 3.6 V lithium cells divided into two modules for the 103-304742 assembly. This is therefore a pack of 2 distinct packs. The 3.6 V voltage corresponds to each module; the values must not be added together to describe a single power supply. The stated capacity is that of each module, not the sum of the two.

Verification before replacement

Before ordering these 3.6 V modules, compare references 2XER18505M and 103-304742. Check the layout, dimensions, connector and polarity. Also check for the possible presence of a connection harness on the old assembly. A pack using the same technology may have a different connection. If in doubt, send clear photos of the installation and the original connectors to our technical service.

Use and safety

These primary lithium batteries must never be recharged. Before intervention, put the system into maintenance mode according to the manufacturer's instructions. Respect the polarities and avoid any short circuit, crushing, piercing or exposure to excessive heat. After replacing the Visonic siren kit, perform the planned functional test. The maintenance procedure can be consulted in the Visonic documentation. Recycle the used elements at an approved collection point.

Discover our selection of alarm batteries. To prepare your order, check the reference of the original module and the connector.