Do you have 9 volt batteries rolling around loose in a kitchen junk drawer? If so, you should know that these batteries are capable of causing a fire if they come in contact with metallic objects in the drawer like paper clips, pen clips etc.. The danger occurs when the metallic object touches both the positive and negative posts on the top of the battery. Storing 9 volt batteries in a plastic bag with other batteries can also be dangerous.

Below are links to two news articles about the fire dangers of 9 volt batteries. Once you read them, you will probably think twice about how to store these batteries.

The first is a Pittsburgh CBS news article;
http://pittsburgh.cbslocal.com/2012/08/22/experts-warn-against-storing-9-volt-batteries-in-junk-drawer-due-to-fire-hazard/

The second is a New Hampshire Dept of Safety article;
https://www.nh.gov/safety/divisions/firesafety/news/20120808-9-volt-batteries.html