250
A tiny radioactive battery could keep your future phone running for 50 years
(www.techradar.com)
This is a most excellent place for technology news and articles.
On the news tonight, will your uraniuam cellphone give you cancer? The answer might NOT surprise you, it's yes; it's uranium.
Mine what? Don't threaten me with a good time.
Polonium 210 typically in these devices. We've mostly sent them hurdling into space so far.