Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Defective - reversed polarity! Fire! Burnt up my device!!

WARNING! FIRE HAZARD!! Sadly, the battery pack I received was defective. And it had enough charge to attempt to "run" the cordless phone I installed it in. After some minor smoke (for real) that handset is destroyed. I would certainly avoid this as yet another example of Chinese low quality. If you have purchased these, I strongly suggest you grab a DVM and check polarity first. By the way, it is not reversed internally in the battery. The wiring from the battery is correct in that the red wire is positive. But the connector was installed backwards and thus polarity is reversed via that problem. Clearly, no final check at the factory. So I would only believe it to be safe after checking with a meter and disregard wire colors, connector markings/keyings etc. Better yet - don't buy it! Or return it!!