Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not a good product

i cant recommend this. it is large, clunky, and as far as i can tell does not do the charge/discharge cycle which it promised. i say this, because the display is unreliable, and if you switch the batteries to different slots, the same readings do not follow the same battery in the new slot. it also gets hotter than i like. i rarely use it, and only when i can watch it and feel how hot it is getting over several hours. i would not leave it plugged in overnight. it does seem to charge the batteries, according to a battery charge tester i have, but i don't trust this unit and don't like it.