Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor battery life

These lights look great, but they don't last the night, which means they're not great as night lights for kids. For my daughter this meant that she woke us up at about 3am when the room was pitch black again. Also, after I'd had them for a year, the battery life got even worse, one of them only lasts a few minutes and the other less than an hour. I'm currently on Amazon trying to find replacement batteries otherwise, they really are useless now.