They are CR2032 and I'm supplying a couple op amps (used as noninverting and inverting amplifiers), four potentiometers, and an ATtiny84 microcontroller. I don't know much about batteries, but I saw that the CR2032 had 225mAh capacity. I know that's only capacity, but I figured it could source enough current for my application. Any other ideas on a small battery that would source enough current?