Keiron Kinninmont wrote:
"Ron Hardin" wrote in message
...
Supposedly, Lithium cells thrive in cold. I don't know about the
rechargeables.

If anyone knows anything further about rechargeable litium cells i'd
be greatly interested. Truth is i dismissed them because i could only
find 1000mAh (limited search i grant you) but will these 1000mAh
lithium cells out perform 1000mAh cells of the other varieties in any
respect?


And NiCd's generate their own heat in use, but of course you're
dealing with greatly reduced capacity compared to NiMH. The heat is
probably why there is reduced capacity, in fact.

sorry, some confusion here i think. are you saying the heat is why
NiMH cells are reduced capacity, as this is what i'm using currently
and the temp is generally cold between 4 and -2 (yes, yes i know you
canadians, americans and russians get proper cold but this is cold
for this sceptred isle lying right in the path of gulf stream)

If the light unclips, carry a second one in your pocket and swap
them, to double the runtime. Maybe the second one will then heat
back up, and you can continue the process.

A fair idea but the commute isn't really long enough that the cells
would warm back up, it's only a 25min max commute, long enough for
the negative effect but not long enough to warm anything back up.
Even if i start with a spare in my pocket it's generally quite cold
when i comes to changing it.

Ron Hardin


Cheers Ron.

Additions please folks.

Charging Li-ions can be a dangerous matter. Read the FAQ below.

http://www.greenbatteries.com/libafa.html

--
Phil