Batteries freeze after vigorous shaking

The batteries cool very well. In a test with a cool bag (not box!) Also of Ezetil with a volume of 28 liters kept the temperature inside for about 6 hours at +12 ° C, while outside temperatures around 27 ° C prevailed. In the big cooler bag there was only a 1.5 liter water bottle. For a better cooling result is a cooler bag or box should always be fully loaded and include battery packs, so not too much air is left - because cools less than solid objects (air is a poor conductor of heat).

In the beginning I got one of the batteries is not frozen in my freezer! This also seems to go the other way, if you look at the comments of some reviews about the batteries. Even after 2 days there was nothing frozen, although I have put the battery in the same location as the other.

Luckily I then remembered a post of a science program in which it was a matter that you can freeze closed drinks and do not freeze yet. The crystallization (ie the freezing of the liquid) then occurs only when there is a so-called "crystallization seed" in the liquid, for example, dust or the like. Or only when a blow to the bottle freezes the liquid. This occurs particularly with liquids which have been filled sterile.

I then took the still liquid battery after 2 days from the freezer, shaken him hard and lo and behold, after a few seconds from the liquid a kind of gel. After repeated freeze for 6 hours the battery was then completely frozen. Just as a tip for those who have a frozen battery, which does not want to freeze. ;-)