Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Used for video productions in Las Vegas

Our Las Vegas videographers use the Energizer 9 volt rechargeables in our wireless mics for many of our events. They are great for high power over short periods of time. I'm sure they would be horrible in baby monitors, smoke detectors, etc. but that is not what they are really made for. Good solid battery but costs a bit more than its competitor "Rayovac" 9 volt rechargeables.Andrew HamiltonHamilton International Productions