Is it just rechargeables (Nicd and NiMH) that aren't supposed to like
cold temperatures?

We have a WH1090 weather station in the garden, powered by two AA
alkalines ( Costco /Kirklands ie nothing special) , and it worked fine
at the lowest we've seen so far; -11.4C.

According to the specs it can go down to -40 but I don't think any
batteries would like that.
--
Reentrant

Reentrant wrote:
Is it just rechargeables (Nicd and NiMH) that aren't supposed to like
cold temperatures?

We have a WH1090 weather station in the garden, powered by two AA
alkalines ( Costco /Kirklands ie nothing special) , and it worked fine
at the lowest we've seen so far; -11.4C.

According to the specs it can go down to -40 but I don't think any
batteries would like that.

Probably fine in a low drain device but I know of divers who have had
problems with alkalines in high drain devices (like big torches) in cold
waters.

Tim

On 08/01/2010 11:42, Reentrant wrote:
Is it just rechargeables (Nicd and NiMH) that aren't supposed to like
cold temperatures?

We have a WH1090 weather station in the garden, powered by two AA
alkalines ( Costco /Kirklands ie nothing special) , and it worked fine
at the lowest we've seen so far; -11.4C.

According to the specs it can go down to -40 but I don't think any
batteries would like that.

We too have some external wireless thermometers - they have always
worked so far as I am aware. But if the batteries are towards the old
end, the cold weather might force replacement.

Energizer Ultimate Lithium are supposed to operate down to -40.[1]

[1] Please don't point out that I have not put C or F after that. :-)

--
Rod

On Fri, 08 Jan 2010 11:42:12 +0000, Reentrant wrote:

Is it just rechargeables (Nicd and NiMH) that aren't supposed to like
cold temperatures?

We have a WH1090 weather station in the garden, powered by two AA
alkalines ( Costco /Kirklands ie nothing special) , and it worked fine
at the lowest we've seen so far; -11.4C.

According to the specs it can go down to -40 but I don't think any
batteries would like that.

Batterues don't just stop working at a certian temp - the internal resistance goes up, so
higher-load devices will notice problems long before light-load things like weather stations.

Rod wrote:


Energizer Ultimate Lithium are supposed to operate down to -40.[1]

[1] Please don't point out that I have not put C or F after that. :-)

Well, it is unlikely to be Kelvin, but it could be Réaumur, Rankine,
Rømer, Newton, or Delisle.

-40°C = -40°F = 233.15 K = -32°Ré = 419.67°Ra = -28.5°Rø = -13.2°N =
-210°De

Sid

Sidney Endon-Lee wrote:
Rod wrote:


Energizer Ultimate Lithium are supposed to operate down to -40.[1]

[1] Please don't point out that I have not put C or F after that. :-)

Well, it is unlikely to be Kelvin, but it could be Réaumur, Rankine,
Rømer, Newton, or Delisle.

-40°C = -40°F = 233.15 K = -32°Ré = 419.67°Ra = -28.5°Rø = -13.2°N =
-210°De

Sid

Sorry, make that +210°De

Sid.

Sidney Endon-Lee wrote:
Sidney Endon-Lee wrote:
Rod wrote:


Energizer Ultimate Lithium are supposed to operate down to -40.[1]

[1] Please don't point out that I have not put C or F after that. :-)

Well, it is unlikely to be Kelvin, but it could be Réaumur, Rankine,
Rømer, Newton, or Delisle.

-40°C = -40°F = 233.15 K = -32°Ré = 419.67°Ra = -28..5°Rø = -13.2°N =
-210°De

Sid

Sorry, make that +210°De

Sid.

And -13.5°Rø - teaches me to try and do it all in my head. I'm out of
practice.

Reentrant pretended :
We have a WH1090 weather station in the garden, powered by two AA alkalines (
Costco /Kirklands ie nothing special) , and it worked fine at the lowest
we've seen so far; -11.4C.

As have I and mine is still on its original cells. I think it is
current delivery (rather than voltage) which mostly affected by the
cold weather and these do not draw very much current.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On Fri, 08 Jan 2010 12:55:19 +0000, Rod
wrote:

On 08/01/2010 11:42, Reentrant wrote:
Is it just rechargeables (Nicd and NiMH) that aren't supposed to like
cold temperatures?

We have a WH1090 weather station in the garden, powered by two AA
alkalines ( Costco /Kirklands ie nothing special) , and it worked fine
at the lowest we've seen so far; -11.4C.

According to the specs it can go down to -40 but I don't think any
batteries would like that.

We too have some external wireless thermometers - they have always
worked so far as I am aware. But if the batteries are towards the old
end, the cold weather might force replacement.

Energizer Ultimate Lithium are supposed to operate down to -40.[1]

[1] Please don't point out that I have not put C or F after that. :-)

My CH programmer was lying in the living room today while the windows
were out as I was getting new windows fitted and when i eventually
found as they were clearing up the LO warning message was showing (
room temp 5 deg C) but as it warmed up it went back to normal..The 2
batteries are Energizer Lithium AA's

On 08/01/2010 14:45, Sidney Endon-Lee wrote:


Sidney Endon-Lee wrote:
Sidney Endon-Lee wrote:
Rod wrote:


Energizer Ultimate Lithium are supposed to operate down to -40.[1]

[1] Please don't point out that I have not put C or F after that. :-)

Well, it is unlikely to be Kelvin, but it could be Réaumur, Rankine,
Rømer, Newton, or Delisle.

-40°C = -40°F = 233.15 K = -32°Ré = 419.67°Ra = -28..5°Rø = -13.2°N =
-210°De

Sid

Sorry, make that +210°De

Sid.

And -13.5°Rø - teaches me to try and do it all in my head. I'm out of
practice.

OK! I give in.

--
Rod

In article
s.com, Sidney Endon-Lee writes

Well, it is unlikely to be Kelvin, but it could be Réaumur

Thanks for that. I inherited a dual- display wall thermometer some
years ago which is calibrated in centigrade and Réaumur. Always
wondered what that was about.

--
(\__/)
(='.'=) Bunny says Windows 7 is Vi$ta reloaded.
(")_(") http://imgs.xkcd.com/comics/windows_7.png