Instruct: Classify a given review into positive or negative sentiment.
Query: Great - Until the Battery Dies...

We installed this unit a couple of years ago. I noticed (during a torrential thunderstorm), that our sprinklers were still running. I went and checked the sensor - battery is dead. I look to change battery - sealed. No user serviceable parts. I mean come on, they can't make it so you can change what is probably a two dollar battery?Quite expensive for a disposable product...