Apple Resources - Acceptable Operation Temperatures
http://edu-observatory.org/olli/Apple_Resources/Temperatures.html



Maximizing Battery Life and Lifespan
  https://www.apple.com/batteries/maximizing-performance/   

  


Keeping AirPods within acceptable operating temperatures
  https://support.apple.com/en-us/HT211884   

Keep your Mac notebook within acceptable operating temperatures
  https://support.apple.com/en-us/HT201640 

  Use your Mac notebook where the ambient temperature is
  between 50° and 95°F (10° and 35°C). Don't leave your Mac
  notebook in your car, because temperatures in parked cars
  can exceed this range. You should also use your Mac notebook
  where the relative humidity is between 0% and 95%
  (noncondensing).

  Use your Mac notebook on a stable work surface that allows
  for good ventilation. Don't use your Mac notebook in your
  bed, on a pillow, or under bedding. Don't put anything over
  the keyboard.

  Use only Apple-authorized power adapters.

  If your Mac notebook gets warm even when it isn't doing
  tasks that require intensive calculations, or if it has fans
  that run for a long time, use Activity Monitor to check CPU
  activity. Look for malfunctioning processes that can put a
  significant load on the CPU and check for unexpected fan
  use. If issues persist, close and open the lid on your
  notebook, or restart your computer. If you have an
  Intel-based Mac, reset the SMC.
  

Keep Apple Watch within acceptable operating temperatures
  https://support.apple.com/en-us/HT204508

If your iPhone, iPad, or iPod touch gets too hot or too cold
  https://support.apple.com/en-us/HT201678
  
  Use iOS and iPadOS devices where the ambient temperature is
  between 0° and 35°C (32° to 95°F). Low- or
  high-temperature conditions might cause your device to
  change its behavior to regulate its temperature. Using an
  iOS or iPadOS device in very hot conditions can permanently
  shorten battery life.

  Store your device where the temperature is between -20° and
  45°C (-4° to 113°F). Don't leave your device in your car,
  because temperatures in parked cars can exceed this range.
   
 
     
     
  

 
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