Even though I have to throw dead devices away, I hate to throw away their batteries, which means I have a drawer with flat little batteries from phones and cameras, cubical little batteries from video cameras, and oddly shaped batteries from tools, etc. With all these, the charging circuits were a part of the original device.
Is there any practical way for a non-electrical engineer to make use of these as general power sources? It seems a shame to waste them.
I have to say that reading other questions about batteries does not raise a lot of hope, but I thought I would ask anyhow.