Abstract: Methods and systems for heating limb blood vessels are provided. An example system may include a wearable device comprising a body configured to be disposed on a limb of a user. The wearable device may include a battery disposed within the body. The wearable device may include a heating component disposed within the body and powered by the battery. The heating component includes a heating element configured to cover a portion of a skin of the user, the portion of the skin covering at least one blood vessel of the limb. The heating element can be configured to provide heat to the portion of the skin and of the blood vessel to cause the blood vessel to dilate. The wearable device may include a controller disposed within the body and configured to regulate a temperature of the heating element. The body can be wrapped around the limb.

Abstract: A flexible battery and method of manufacturing thereof are provided. An example flexible battery may include a first current collector comprising a first copper plate, an anode layer disposed on the first current collector, a second current collector comprising a second copper plate, a cathode layer disposed on the second current collector, and a separator layer comprising a polymer material. The anode layer may comprise a composite of thermoplastics, silver powder, and potassium hydrogen carbonate. The cathode layer may comprise a composite of thermoplastics and a freshly prepared zinc hydroxide. The separator layer can be impregnated with an electrolyte comprising an aqueous solution of potassium hydroxide, lithium hydroxide, potassium zincate, and modifying additives. The modifying additives may include a monobasic organic acid, a dibasic organic acid, and a tribasic organic acid as anion donors, and one or more complexones as cation electron acceptors.

Abstract: A system for charging batteries of clothing is provided. The system may include a body made of an electric insulation material. The body can be configured to receive a hanging loop of the clothing. The system may include first electrical contacts disposed on the body, and a wire at least partially disposed within the body. The wire may be configured to provide an electric current to the first electrical contacts. The system may include second electrical contacts disposed in the hanging loop of the clothing. The second electrical contacts may be configured to electrically connect to the battery of the clothing. The first electrical contacts may be configured to touch the second electrical contacts when the hanging loop is hung on the body.

Abstract: Methods and systems for heating of heated clothing are provided. An example system may include system comprising one or more heating components placed within one or more zones of the heated clothing and configured to receive electrical current from one or more voltage converters independently. The system may also include a battery configured to provide power to the voltage converters. The system may also include a controller configured to control an output voltage of the one or more voltage converters, wherein the output voltage is provided to the one or more heating components. The controller may be configured to receive temperatures from the temperature sensors located in heating components, an ambient temperature from the ambient temperature sensor, and user-defined temperatures. The controller may adjust the output voltage based on the temperatures received from the temperature sensors and adjust ambient temperature and user-defined temperatures.