BE CAREFUL! One thing apprentices have done is
to mistakenly replace the backup NiCds in some TVs
with alkaline cells. Both AA size, which explains
the mistake.

They WILL burst, releasing acid liquid and vapor.
I've cleaned it from a few sets. The Philips one
I remember trickles about 4mA into the battery,
can't speak for very low currents but 4mA killed
that one in a couple of days.
-Roman


Jinx wrote:
>
> The shelf life for a 1.5V alkaline cell is given as 10 years. If
> I use such a cell for rare back-up occassions in a circuit and
> keep 1.65V across it (correct terminal voltage ?), will it then
> last indefinitely ?
>
> I'm guessing that the 10 years is the period of self-discharge
> after which th cell is flat, and hopefully not the time after which
> is expected to corrode, charged or not
>
> The circuit requires >1.6V, NiCd or other battery types not an
> option. Quite happy with just the one alkaline

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