Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Haven't had a Fire yet to tell

They have really changed in 10 years since the last time bought them. These were a replacement for older models and one thing i found is less annoying alarms going off because of the stove. Also like the one battery flip out tray holder, much essayer to replace than the older models were you needed to flip down the cover and try to dig out both 9 volts, not easy. Since haven't had a fire yet can't say they work and hope i never find out if they do but they did test fine.