How Long Does An Alarm Battery Last. The DSC Impassa backup battery lasts about three to four years in most cases. Most battery powered smoke detectors will beep for a minimum of 30 days before the battery dies.
If the level of charge does not go above 126 volts you need to get a new battery. As a general rule most alarm system backup batteries will last around 3 to 5 years. If fully charged and in working order a panel battery can keep your alarm working for upto 12 hours without mains power.
On the other hand the batteries in hard-wired smoke alarms can also last for ten years though not as the primary source of power.
As a general rule most alarm system backup batteries will last around 3 to 5 years. As a general rule most alarm system backup batteries will last around 3 to 5 years. You will detect the reason why the car alarm goes off. If you need to replace your battery please contact customer support for more information.
