I want to power a self drive piezo buzzer with a rated current given as >3mA. http://www.microbuzzer.com/buzzer/spec/TE-HPS12C-H2.5.pdf
I am looking for a small battery I can use to power the buzzer (and drive circuit), but it is hard to get a battery with a Continuous current of 3mA that is not also too large in size for my liking. The buzzer has dimensions of 12*12 H2.5mm and I would like a battery somewhere on the same scale if possible.
The buzzer sound output is given as >75 dB, but I do not mind if it falls below this (say to around 60 dB). For this reason, I am thinking that a smaller battery with a Continuous current lower than 3mA could be used - resulting in an (acceptable) lower sound output. Am I correct in thinking this? I am wondering if anyone can offer any advice/opinions on how low I can go with the Continuous current of the battery. At what level will the battery be unable to power the buzzer? Could I use a battery with a Continuous current lower than 1mA? Is there anything else I should be aware of when selecting the best battery for my purpose? (electrical engineering novice here - my science education stopped after "this is a liquid, this is a solid, this is a gas"... I am serious)