We all have more appliances with, normally no extra sockets. This leads to trailing wires and
overloaded adaptors/circuits In many parts of the US all new homes have smoke
alarms in every bedroom
This is starting to happen in the UK too, and is recommended by Kidde.
Most fires start at night when the family will be asleep, so having an alarm
in each bedroom shortens the time to wake all the inhabitants.

Children in their own bedroom with pc/games console, etc can
become immersed, & not hear or react to a smoke alarm sounding.

Audibility:
Australian research shows if the nearest alarm is
on the landing children are likely to ignore if not in their own room.

Battery Issue:
Government data shows approximately 40% of smoke alarms
do not work in a fire.
This is because large numbers have flat or missing batteries, or are wronglly sited..
By using alarms with sealed in batteries the battery situation can be avoided.

They are the alarm of choice for Social Landlords as though the initial purchase
price is higher, over a 10 year period, they are better value,
as no replacement batteries have to be fitted,
.

Maintenance Matters:
Follow alarm manual maintenance recommendations
eg Test weekly/vacuum around alarm monthly.

New lifestyles - new dangers
Candles / incense / joss sticks now occur in Government Fire Statistics
as (New) sources of fire.

Their increasing usage heightens the risk of fire if left unattended.