In article , taz24taz24
@blueyonder.co.uk says...
They tend to be "high temperature" versions (gets warm in emergency
lighting luminaires) so separator design has to be good. Dendritic
crystal growth through separators is the usual failure mode of Nicd's


--
Keith Lewis

Is that a white powdery substance. Or I'm I just
thinking of corrosion that forms on the aluminium
casing sometimes.
taz.


FWIW, The white powder associated with (leaking/venting) NiCds is
usually potassium hydroxide, a rather caustic material. A chemical
"cousin" is soduim hydroxide (lye). Don't ingest or get in eyes,
needless to say...

Woody