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TOPIC: Lifespan of CR2032 batteries and LEDs

Lifespan of CR2032 batteries and LEDs 4 months 2 weeks ago #1

I'm looking to build a circuit that involves the use of several small LEDs.

I am currently theorising the build. I would like to have the LEDs illuminated as much as possible to light up a sheet of flat perspex.

I don't have much specific details on the voltage of the LEDs (maybe close to 1.5V per LED), but how long can a CR2032 battery last before it looses charge. And would it be better to use AA batteries instead? Here is the datesheet of CR2032

I would like to keep the batteries as compact as possible due to the limited space the build will be housed in.

EDIT: Thanks for your help. Spending some time looking up the LEDs I already have sitting at home. They are the piranha LED's. Very much similar to these. Have a current draw of about 20mA, so the current needed for a single LED is not too much, but if I remember my physics class correctly, (and some helpful Googleing), current draw will increase as more lights are added in parallel.
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