"Stale charge" has been known to folks that test batteries for a long
time. The "memory effect" is just a specific manifestation of stale
charge. _Every_ type rechargeable battery has this characteristic. It
is just a matter of degree. In NiCads, it happens to be a very
significant drop in specific power when you go beyond routine SOC and
try to access seldom used charge. Thus, ni-cads are said to have
"memory effect".
If you continue to (gently) discharge ni-cads (or other cells) beyond
the boundary of the memory, then you erase the "memory". Like magic,
everything works like it used to.
Bill D.
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