I have found these "bluetooth location stickers" on this website
Inside the stickers is a buzzer and a light. I am trying to build something similar, but with no light - just a buzzer - and I am trying to find a battery suitable for use with a piezo buzzer that has a rated current of 3mA.
This company says their stickers use a CR2016 watch battery. The examples that I found of CR2016 batteries seem to have a
Nominal voltage: 3V,
Nominal capacity: 75mAh,
Standard current: 0.1mA, Continuous current (maximum): 1mA, Pulse current (maximum): 10mA,
The lowest rated current piezo buzzer I could find here http://www.microbuzzer.com/smd-piezo-buzzer has a Rated Current of ≤3mA (second from the top of the list)
Based on this data, is it safe to assume that a battery with a Continuous current (maximum) of 1mA can power a piezo buzzer (and drive circuit) with a rated current of 3mA? Am I missing something here? Wouldn't the buzzer demand more current?