There are already some devices on the market that can harness the body’s heat to generate electricity, such as thermoelectric generators. By placing these devices close to the skin, they can convert the heat produced by the body into electrical energy.
Using this technology while sleeping could be a convenient way to charge a smartphone without needing to plug it in. This could be especially useful for individuals who may not have access to a power source while they sleep, such as while camping or traveling.
However, it’s important to note that the amount of electricity generated by body heat is relatively small compared to traditional charging methods. The efficiency of these devices is still being improved, so it may not be able to fully charge a smartphone overnight. But it could potentially supplement the charging process and extend the battery life of the device. It’s definitely an interesting concept that could have practical applications in the future.