please watch this video guys and gals, i had no idea about this hidden danger !

[GOTWING]

https://www.youtube.com/watch?v=CnVDayI-gwI

[polywideblock]

it is something to watch out for      

    I  must  remember to keep the steel wool and the batteries in separate draws 


notice how they warned about coming into contact with all sorts of metal things and then kept going back to the steel wool for effect 

       both should be part of any survival kit      a $2 pack of steel wool can start hundreds of fires off one 9v  battery 

[John_Kunkel]

It's not only 9-volters. Any used dry cells tossed in a box have the potential to accidently wind up touching terminals in such a way to cause a short. Had an incident where I used to work that caused a serious fire, after that we had to duct tape the ends of all used batteries before turning them in for recycling.  

[Patronus]

Huh, I worked right across the street when that happened...