Instruct: Classify the given Amazon review as either positive or negative.
Query: non-functioning after one use

Bought this thermometer and after one use, we thought that the battery died based on other people's reviews. However upon replacing the battery with new batteries, we realized it might not be a dead battery, but a defective unit. Unfortunately it's too late to return the product - lesson learned to next time check the battery sooner instead of assuming what the problem is. Very disappointed in the product - hope to find a better thermometer soon.