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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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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 |
#2
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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 |
#3
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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 |
#4
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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. |
#5
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![]() 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 |
#6
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![]() 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. |
#7
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![]() 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. |
#8
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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 |
#9
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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 |
#10
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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 |
#11
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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 |
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