What to do with dead batteries?

I have about 30 or more dead AA's AAA's and a 9v sitting in a bucket in my room, Are there any projects that I could do with them?

zaiedishaq8 years ago
Recycle it.
there is zinc and manganese dioxide inside , with manganese dioxide and hydrogen peroxide you can make pure hydrogen , just watch out when cutting open the batteries , there is potassium hydroxide inside (corrosive)
use them to run a joule theif.