Eli5: Why do domestic fire alarms take a rectangular battery instead of AA/AAA?
In: 12
Those rectangular batteries are 9 volts, AA batteries are 1.5 volts, so it would take 6 AA batteries to replace 1 rectangular battery.
I’m believe that a 9V rectangle is equivalent to 6 AA’s while being cheaper. So it’s compactness and cost for the power supply.
I’m believe that a 9V rectangle is equivalent to 6 AA’s while being cheaper. So it’s compactness and cost for the power supply.
They need the higher voltage
A rectangular 9V battery is just 6 AAAA batteries in a box
If you want to get 9V from AA or AAA batteries then you still need 6 but now your battery compartment is longer and wider taking up wayyy more volume in the smoke detector making it a lot bigger
Those rectangular batteries are 9 volts, AA batteries are 1.5 volts, so it would take 6 AA batteries to replace 1 rectangular battery.
I’m believe that a 9V rectangle is equivalent to 6 AA’s while being cheaper. So it’s compactness and cost for the power supply.
Those rectangular batteries are 9 volts, AA batteries are 1.5 volts, so it would take 6 AA batteries to replace 1 rectangular battery.
They need the higher voltage
A rectangular 9V battery is just 6 AAAA batteries in a box
If you want to get 9V from AA or AAA batteries then you still need 6 but now your battery compartment is longer and wider taking up wayyy more volume in the smoke detector making it a lot bigger
They need the higher voltage
A rectangular 9V battery is just 6 AAAA batteries in a box
If you want to get 9V from AA or AAA batteries then you still need 6 but now your battery compartment is longer and wider taking up wayyy more volume in the smoke detector making it a lot bigger
my smoke/CO alarm takes 2 AA’s. so this is incorrect. Its a first alert, so pretty common brand. in fact googling “smoke and co alarm 2 AA” yields a lot of domestic alarms that do. So there is no Eli5, you are just mistaken.
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