Therma-Phone™ Cases are sophisticated, yet compact and flexible cases consisting of up to ten layers of specialized materials engineered to create a NASA-like thermally protective space suit around a mobile phone. (For information about space suits click NASA Space Suit Evolution). Internal heat reflectors retain heat when it's cold outside while micro-external heat reflectors keep out the heat when it's hot outside. Just squeeze a Therma-Phone™ Case in your hand, and you will know it's working as you feel it warm up when your body heat is reflected back to you.
A mobile phone is the best survival tool we own. If we are lost in the woods, we can use the GPS or compass. If we are injured, we can call for help. We count on them in an emergency.
What can cause our best safety tool – a mobile phone – to fail when we need it most?
Mobile phones such as Apple’s iPhone X are designed to operate within certain temperature limits. There is a cap on the maximum operating temperature and anyone who has seen the warning “iPhone needs to cool down before you can use it!” understands that until you take it out from the sun or away from the heat source it will not turn on. There is also a minimum operating temperature but in this case, dropping below the temperature will not show a warning. Instead, the battery life will drop dramatically until the phone is dead.
Most importantly, normal, everyday use of the phone can place it outside a manufacturer's operating specification of 32° to 95° F. The phone can easily exceed these limits during a day at the mountain or a day at the beach. (see Apple support for more details)
The chart below shows what happens when a phone is subjected to extreme cold with and without Therma-Phone™ protection.
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