Here's a coin cell holder for mounting the most common types of coin cell batteries: CR2032 and CR2025. You could try other batteries but we're guessing you won't have much luck with 'AA's.
These are perfect for adding 3V of energy to a small form factor project. The holder features a quick spring release on the positive terminal so you don't have to use a flat-blade screwdriver to pop it out. It's one of the narrowest coin cell holders we could find with only a 1mm lip all the way around. Put it to good use in your robot, datalogging, or blinking LED circuits.
Dimensions length/width (mm): 22 (smallest diameter) x 24.5 (greatest diameter)
Dimensions height (mm): 8.4 (greatest height) x 4.25 (lowest height)