Battery for-Visonic Siren MCS-740 SR-740 PG2 PowerMax Box 2XER18505M 103-304742 

Description 

The Visonic MCS-740 siren comes fitted with two ER18505M lithium battery packs. BatterEasy offer a replacement Extended Life 3.6Ah siren battery which lasts approximately 3yrs. The MCS-740 and SR-740 PG2 must have 2 battery packs installed.