Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So - So

Purchased two batteries so that I might keep one charged while using the other. Unfortunately it turned out to be lucky that I ordered two batteries because when they arrived only one took a charge while the other came up as "Incorrect battery" on the phone's screen. The price was far less than I had expected and so I did not bother to return the defective battery. The vendor's response to the order was exceedingly prompt.