2XER18505M Battery for Visonic MCS-720B, MCS-740 siren, DSC Siren Res Fire, Burg Siren, Siren PG9901, PG9911, Tyco Wireless Indoor Siren Res Fire, Burg Siren, PG9901, 16000mAh - sold by smavco - Walmart.com
Visonic Replacement Battery for MCS-740 Bell Box (Pack Of 2) | 103-304742