Visonic siren battery: The Visonic MCS-740 and SR-740 PG2 siren are fitted with twin pack ER18505M lithium battery.

• Type: EVE Lithium AA Battery, ER18505M
• Qty: 2 PCS
• P/N: 103-304742, 2XER18505M
• Finish: Black wrapped, 50mm cable