On 11/01/12 12:12, [email protected] wrote:
Hi All,
It is "said that" NiCad battery cells usually fail to "short circuit"
and that Lithium Ion ones usually fail by just loosing their ability to
hold a charge viz they go "open circuit"
Is this true or....?
many thanks
Graham
G3VZV
It certainly *seems* to be true. We have radios with NiCads that are
still struggling on with reduced capacity but when they go, they go dead
short across the cell. This is because little whiskers of cadmium
eventually grow across the electrolyte.
NiMH doesn't seem to do this, and can otherwise be considered a drop-in
replacement for NiCad.
The Lithium Ion batteries we use seem to hold up pretty well until about
600 cycles, then fall off very rapidly.
--
Gordonjcp MM0YEQ
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