Instruct: Classify Amazon reviews into positive or negative sentiment
Query: ST01 series "eats" batteries

I had to replace an earlier model that went belly-up a couple of months ago after working fine for 4 years. The replacement unit that I picked up was the Intermatic Model ST01 series. The engineers had redesigned the unit to use a camera battery (CR-2) instead of the previous models AAA batteries. Bad design!!! The CR-2s only last less than two months. I've gone through 4 batteries in about 7 months. They should never have gotten away from the AAA batteries!!! ...I've got to find another timer that uses a different battery design.