The news has broke that putting to large a battery into the Samsung Galaxy Note 7 may have led to the batteries to "plate" do to the limited space and that cause it to leak lithium and catch on fire. Samsung has recalled them all and there's talk that they may replace the batteries and sell them refurbished. Good luck with that.
Galaxy Note 7
There have been reports of replacement Samsung Galaxy Note 7 phones exploding, indicating that the problem may not be fully resolved. One of the stories was from a Southwest Airlines flight. A passenger's Note 7 got very hot, so he threw it on the ground, it started smoking, and they evacuated the plane. The phone had not only burned itself, but it burned through the carpet to the subflooring on the plane. Samsung still has to investigate, along with the Consumer Product Safety Commission to see if the phone really was fixed.
Samsung announced the Galaxy Note 7 this week. When the first Note came out, it was ridiculed for being way too big, but now it's common. It's popular for the bigger screens and for the improved battery life over smaller phones. People were surprised at the Samsung announcement because they expected the battery in the Note 7 to be smaller, when it actually will be bigger. While the original Note had a removable battery, the previous Note 5 did not. It also did not have an SD card slot for memory expansion.