Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Quality Control -- Lemon in the Night

We own several of these water alarms, having recently purchased three after good experiences with earlier ones. BUT, one of those new purchases is a battery eater -- four new 9v batteries including two of the more expensive long-life types since we put it into service in February. When the battery gets drained, the alarm chirps to let you know -- unfortunately, it's easiest to hear the chirps at night, in bed. And it's hard to know which unit is chirping until you get up, traipse around, and locate the exact source. Now I learn that the return period expired ten days ago. My advice would be to return one of these clunkers as soon as it eats the second battery. The others have lasted over a year before needing a battery replacement. If the seller or manufacturer would like a defective sample to test, I have it right here on my desk...