Did the recalled Note 7 explode while charging and / or just sitting uncharging ?

[bialy]

Did the recalled Note 7 explode while charging and / or just sitting uncharging ?

 

[dpham00]

Both.

 

[LegalAmerican]

Is explode the right word? I never really dug too deep into the reports, did the phones actually release energy that spread the fire, or did they just slowly heat up, expand, and catch fire?