These LR44 button cell batteries are fairly common but it can be hard to keep them around. They fit the digital calipers, so if you use yours as much as we use ours, you may want to go ahead and pick up a spare.
Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.