Hello all, I have a simple circuit using a cr2032 3v 225mAh battery and a 5mm red LED rated at 20mA with a potentiometer up to 10k ohm. I am trying to figure out how long the battery would last at full power (basically without the potentiometer in the circuit) and my electronics is very rusty. Can anyone give me some idea as to how long I can expect this battery, assuming full charge, would last. Thanks in advance.