Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great batteries...

Use these with my bike lights and they work quite well. Don't know how many hours of life I get out of them, but they haven't failed me yet. Do recommend carrying spare alkaline batteries with you if you absolutely need to make sure you can get to your location. I use these to help limit the junk I send for recycling and they are handy for the trips around town, where I am running later than expected.