Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Energizer rechargable batteries are great, so don't ruin them with this charger.

I chucked this battery cooker in the trash. 15 minute chargers cause the batteries to become very hot. Heat destroys rechargable batteries and this unit will frizzle your batteries in short order, causing you to keep buying more batteries. Good for Energizer but not good for you. Something like a Maha is a good way to go with its pulsed charging and ability to erase the memory effect from old batteries.