True-that, cadmium is indeed gnarly stuff.... At the same time, NiCad batteries are in common usage far-&-wide in everything from tools to toys & quite possibly your laptop & smartphone. So, despite the alarm (& deservedly so), it looks to be a 'long' time before cadmium is no longer in widespread use......but the RoHS & Cd-free is a healthy step in the right direction anyway. https://www.batterystuff.com/kb/articles/battery-articles/what-the-heck-is-a-nicd-battery.html https://en.wikipedia.org/wiki/Nickel%E2%80%93cadmium_battery