Alkaline batteries still working fine in the cold

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

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]

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.

Well, it is unlikely to be Kelvin, but it could be R=E9aumur, Rankine, R=F8mer, Newton, or Delisle.

-40=B0C =3D -40=B0F =3D 233.15 K =3D -32=B0R=E9 =3D 419.67=B0Ra =3D -28.5= =B0R=F8 =3D -13.2=B0N =3D

-210=B0De

Sid

=B0R=F8 =3D -13.2=B0N =3D

Sorry, make that +210=B0De

Sid.

.5=B0R=F8 =3D -13.2=B0N =3D

And -13.5=B0R=F8 - teaches me to try and do it all in my head. I'm out of practice.

Reentrant pretended :

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.

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

OK! I give in.

In article , Sidney Endon-Lee writes

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.