Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dangerous!

I would not suggest buying this! It started making sparking sounds & got really hot after being on for less than 2 hours.It has great features & I was really excited about the display (dim, but who cares) & being able to charge 8 batteries instead of 4, like my old one. Luckily I tried it right away & was sitting in the same room when it started making noises! Scary.