Hello,
Funny experience.
I was about to throw away a few 18650s,
not dormant, but DEAD.
Voltages from .56V to 1.04V.
I know my old DSDs @ 5.5V could do the trick,
but couldn’t find the cords.
Since childhood, I learned to save pennies
and throw away dollars.
Went back to the trash can and retrieved
a couple of cells. Never giving up.
Tried way more expensive chargers to no avail.
Then I stumble into this Work of Art.
Wouldn’t you know it!!!. KABOOM!!!
It started to blink his beautiful, red little eyes.
Batteries charged to 4.18V and remain @ 4.15V
3 days later.
I’ll wash my mouth with muriatic acid
before bad mouthing it again.
If you still have one, keep it.
It may come handy one day.
Happy ending? No.
I sent the cells to
the trash can again.
But not before running a Q5
for an hour out of this dead batteries.
Basically IT WORKS!!!.
Carlos.