An electronic timepiece includes a measuring section that measures a predetermined measurement item, a display capable of displaying the result of the measurement performed by the measuring section, a battery that supplies electric power for driving the measuring section and the display, and a processor including an action controller that prevents switching to a display mode that causes the display to display the measurement result in a case where the remaining battery level of the battery is lower than a predetermined value.

A liquid powered device, including a housing assembly configured to be worn on the wrist of a user. The housing assembly includes a front portion and a back portion. A liquid tank assembly is secured within the housing assembly. The liquid tank assembly has a fluid inlet. A power assembly is secured within the liquid tank assembly. An electronic module assembly is secured within the liquid tank assembly. The power assembly is in fluid communication with the fluid inlet to provide filling of the power assembly. The power assembly and the electronic module assembly are each separately liquid sealed. A pressure relief assembly is positioned within the liquid tank assembly for relief of undesired pressure therein.

A liquid powered device, including a housing assembly configured to be worn on the wrist of a user. The housing assembly includes a front portion and a back portion. A liquid tank assembly is secured within the housing assembly. The liquid tank assembly has a fluid inlet. A power assembly is secured within the liquid tank assembly. An electronic module assembly is secured within the liquid tank assembly. The power assembly is in fluid communication with the fluid inlet to provide filling of the power assembly. The power assembly and the electronic module assembly are each separately liquid sealed. A pressure relief assembly is positioned within the liquid tank assembly for relief of undesired pressure therein.

An external battery device is implemented which can detachably engage with a smartwatch to thereby enable seamless battery replacement and smartwatch battery replenishment without having to remove the smartwatch from a user's wrist. The external battery device can be a bezel that aesthetically fits in a cut-out around a perimeter of the smartwatch's face and locks in place using, for example, a male-female connection mechanism. The external battery device includes a casing that functions as the bezel for the watch. The casing includes a channel inside which a rechargeable battery is positioned. The male connectors of the external battery device extend downward from a hole in the casing to engage with corresponding female receptacles on the smartwatch. In typical implementations, two different shapes of the male and female connection mechanisms may be used to provide a consistent manner in which the user connects the external battery device to the smartwatch.

An energy harvesting system for use with the human body may use an eccentrically mounted weight winding a mainspring that drives a mechanical clock mechanism. The mechanical clock mechanism in turn may produce pulses of electricity, for example, through periodic flexing of a piezoelectric or triboelectric material during the regular motion of the mechanical timing mechanism. By remaining in a mechanical rather than electrical domain, improved simplicity and efficiency may be obtained in the generation of regularly spaced uniform pulses.

An energy harvesting system for use with the human body may use an eccentrically mounted weight winding a mainspring that drives a mechanical clock mechanism. The mechanical clock mechanism in turn may produce pulses of electricity, for example, through periodic flexing of a piezoelectric or triboelectric material during the regular motion of the mechanical timing mechanism. By remaining in a mechanical rather than electrical domain, improved simplicity and efficiency may be obtained in the generation of regularly spaced uniform pulses.

An electronic device for a wristwatch including an electronic module provided with at least one sensor capable of measuring physiological data of a wearer of the wristwatch, and with an electronic control unit associated with the sensor. The electronic device includes a trim element acting as a case back and capable of being removably mounted on a case of the wristwatch, the electronic module being integrally housed within the trim element acting as case back. In one aspect, a wristwatch includes a case having a removable case back and a horological movement housed within the case, with the removable case back constituting the electronic device.

An electronic device for a wristwatch including an electronic module provided with at least one sensor capable of measuring physiological data of a wearer of the wristwatch, and with an electronic control unit associated with the sensor. The electronic device includes a trim element acting as a case back and capable of being removably mounted on a case of the wristwatch, the electronic module being integrally housed within the trim element acting as case back. In one aspect, a wristwatch includes a case having a removable case back and a horological movement housed within the case, with the removable case back constituting the electronic device.

A thermoelectric watch including a thermoelectric generator; a voltage booster connected to the thermoelectric generator; an energy management circuit connected to the voltage booster and configured to control the charging of at least one energy storage element, the energy management circuit including an output configured to change from a first logic state to a second logic state when the thermoelectric generator starts generating electrical energy, and to change from the second logic state to the first logic state when the thermoelectric generator finishes generating electrical energy.

A thermoelectric watch including a thermoelectric generator; a voltage booster connected to the thermoelectric generator; an energy management circuit connected to the voltage booster and configured to control the charging of at least one energy storage element, the energy management circuit including an output configured to change from a first logic state to a second logic state when the thermoelectric generator starts generating electrical energy, and to change from the second logic state to the first logic state when the thermoelectric generator finishes generating electrical energy.