Instruct: Classify a given Amazon review as either positive or negative.
Query: Piece of junk!

Thank God I never had to use this for it's intended purpose! Total waste of money! Charged this thing up as instructed and kept it in the car on standby. Checked it a month or 2 later and it needed charging again, but it simply stopped working and would not take a charge anymore. Thought they were reputable, but I'll never trust Black & Decker again. Should have checked the Internet for all the bad reviews this thing is getting.