Instruct: Classify Amazon reviews into positive or negative sentiment
Query: just plain lousy batteries...

I bought several packages of these to use in a smoke detector. I was tired of running out to the store for a new Duracell every few months, and at half the price, I figured, if they don't last quite as long, what's the harm?As opposed to the Duracell, which lasted six months in my smoke detector, I have had to change these batteries once every 3-4 WEEKS. Judging from the number of positive reviews, perhaps other devices are better matched to these batteries, or possibly there's just really poor quality control. Either way, I wouldn't recommend these to anyone for any critical application.