The cold feet never need to worry again in winter.

Recently, uncle fan, 67, who lives in the new warehouse district of Dongzhimen, Beijing, has revealed that he has invented a shoe that is heated by batteries, which is very suitable for elderly people who are afraid of cold.

The appearance of fan's electric shoes and ordinary sports shoes is basically the same.

Fan said, the secret of this pair of shoes is soles and insoles.

A specially designed 3.7V low voltage battery is installed on the soles, and a non-metallic heating element is added into the insole. It can be connected with metal to achieve electric conduction, and is very soft and washable. It can heat up to 30 degrees Celsius at normal temperature, and then maintain constant temperature.

Mr. Fan's wife is the first beneficiary of this invention.

Nowadays, as long as there are batteries, the old man's cushion, wool shoulder and bed sheets can become hot.

Fan said his technology had already been patented.

It is understood that at present, manufacturers have produced this kind of shoes with heating function for him, but they have not been formally put into the market.

Fan said, the average shoes and leather shoes in the electric shoes are priced at about 1000 yuan, while the boots are higher.

The design life of a battery is 3 years, and the cost of replacement is about one hundred yuan.