Instruct: Classify the given Amazon review into its appropriate rating category
Query: incorrect readings

This unit is difficult to handle when checking a button battery, and it does not give meaningful power readings. I tested several new, out of the box, hearing aid button batteries, and each tested less than 1/2 of the factory specs. I went to the hearing aid center, who checked the same batteries, and they all tested the correct 1.5 factory ratings. The AA and AAA ran about the same variance.