User-Replaceable Battery Type (9V Alkaline Battery)

It has been specified by the Australian Standard (AS) 3786:2014 that the standby mode in a smoke alarm should be capable to run for at least one year before the batter low-fault is shown. Followed by 30 days of a battery fault warning, the alarm should buzz for at least 4 minutes.

Rechargable Battery Type (Non-Removable 10-Year Lithium Battery)

It has been specified by AS that the standby mode in a smoke alarm should be able to run at least 72 hours before the battery-low fault is shown. Followed by 24 hours of battery fault warning, the alarm should buzz for at least 4 minutes.

It is the minimum standard. Manufacturers claim that their batteries provide more power back-up than what is required.

Consumers must be aware of the manufacturer;s instructions regarding the battery replacement in mains-powered and rechargeable smoke alarm batteries.

Every 40 seconds to 2 hours, your might hear a short beep sound but it may be longer if the battery is totally drained during the mains failure.

If you want to know more about smoke alarms, contact your local electrician in Bowral. A master electrician will be happy to assist you in your electrical needs.