Transcripts for KPIX CBS Evening News With Scott Pelley 2016

>> pelley: today, samsung said it is a manufacturing flaw that is causing some galaxy note 7 phones to catch fire. the government's warning owners to turn them off. the same kind of batteries power most everything in our mobile world, so we asked jericka duncan to find out more about them. >> look what just happened to my note 7. >> reporter: after a number of devices with lithium-ion batteries had issues, they're coming under increased scrutiny. the rechargeable lithium-ion batteries are unique because lithium ions move from one side to the other. ions from the positive side are separated by an electrolyte layer but make their way to the negative side when charging. during use, the flow reverses. samsung tells cbs news, the positive and negative side came into contact with each other, causing the manufacturing process error. >> that means there was a short circuit. >> reporter: walter van schalkwijk studies electrochemistry.

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