Here's an image of a leaking AAA Nimh Duracell Rechargeable. I'm going to guess at the age 8-10 years old, but I'm really not sure.
https://www.dropbox.com/s/hmsxq0tri0md8zh/IMG_20200612_165401.jpg?dl=0
https://www.dropbox.com/s/hmsxq0tri0md8zh/IMG_20200612_165401.jpg?dl=0