"Dave Plowman (News)" wrote in message
...
In article ,
R D S wrote:
On 25/01/2021 17:46, HVS wrote:
There are a lot of button batteries out there with the same diameter
and voltage, and which differ only in the thickness of the battery.

Can anyone explain why button cells are used in things that would take a
bigger battery or several?

I'm forever changing the one in our bathroom scales.

Much higher energy density than alkaline. I'm surprised one in scales
doesn't last a long long time

Mine do.

- do they light up or something?

Mine does and loads the data into the phone using bluetooth so
its easy to keep a full record of weight changes over time too.