Sending dozens of messages or playing games for hours can cause your phone to overheat, which can drain battery and even damage the device.

Now an Israeli-American team of developers has built a ‘thermal protection’ case that not only warns you when your phone is getting too hot, it will automatically cool it down.

Called Amited, the case uses micro-fans to blow heat away from the device, or can heat a phone using resistance coils if it gets too cold.




The recommended storage temperature for most batteries is 15°C (59°F), while the ‘extreme allowable’ temperature is 40°C to 50°C (40°C to 122°F).

Studies have found that a phone is most efficient when it’s between 0° and 35°C (32°F to 95°F), and keeping it as near room temperature as possible (22° C or 72°F ) is ideal.



At an average temperature of 0°C (32°F), a lithium-ion battery will lose six per cent of its maximum capacity every year. At 25°C (77°F) degrees that number jumps to 20 per cent.

Optimal syncs with a smartphone over Bluetooth and constantly analyses the phone’s temperature when Auto mode is enabled, using built-in temperature and humidity sensors.


Inside the 0.19-inch (5mm) thick case is a pair of ‘virtually silent’, 0.07inch (2mm) micro-fans with air flow of 1.3 litres per minute. These dissipate the heat and cool the phone down.

Amited is also fitted with an ultra-thin heating coils attached to the back of a conductive copper plate.

When Optimal notices a drop in temperature, Anti-Freeze mode will engage these coils to stop the phone from freezing, even in sub-freezing conditions.


When Auto mode is enabled, these subtle temperature changes are tracked automatically, but this mode can be disabled and users can manually track these changes using the Optimal app.

This app shows temperature changes over time, but also reveals which apps are having the highest thermal effect on the phone.

Users can then set custom operation modes based on their activity and location, set their own custom temperatures zones and set alarm thresholds.

‘Heat is the worst enemy of your smartphone battery,’ said Amited. ‘Like all electronics, constant exposure to the elements will have a negative impact on your smartphone.

‘Intense usage will lead to overheating, while extreme cold weather will lead to some circuits freezing inside your smartphone.

‘In time, these can affect the performance of your phone’s CPU, battery and GPU. And, eventually, they’ll let you down completely.’

‘Optimal is the world’s first thermal protection case designed to keep your smartphone working at its best, no matter where you go or how excessive you use it.’



Amited launched an Indiegogo campaign to fund production of the case on the April 9th, and as for now, they giving almost limited 50% discount for their early adopters, don’t miss it.

Make a pledge or share their Indiegogo campaign to support them.

