An electronic watch includes a hand configured to indicate time, a dial including a mark, a movement including a hand shaft configured to rotate the hand and a motor configured to rotate the hand shaft, and a battery configured to supply power to the motor, wherein the battery is disposed between the dial and the movement, and has a first opening through which the hand shaft passes.

An electronic watch includes a hand configured to indicate time, a dial including a mark, a movement including a hand shaft configured to rotate the hand and a motor configured to rotate the hand shaft, and a battery configured to supply power to the motor, wherein the battery is disposed between the dial and the movement, and has a first opening through which the hand shaft passes.

A horological movement provided with a generator and a circuit for regulating the frequency of rotation of this generator, the regulation circuit being arranged to be able to detect the zero crossings of an induced voltage generated in the stator by the rotating rotor and to generate first braking pulses which are triggered after zero crossings and each end before the induced voltage reaches a peak value, preferably before the rectified induced voltage reaches a power supply voltage provided by a power supply capacity. In addition, the regulation circuit is arranged so as to be able to further generate second braking pulses each of which occurs after detection of the end of a charging period of the power supply capacity during which the induced voltage reaches a peak value and each end before the induced voltage crosses zero.

In an embodiment, an active stylus includes: an enclosure; a first ferrite core disposed inside the enclosure; a wireless power receiver that includes a first receiving coil wrapped around the first ferrite core between the first ferrite core and the enclosure; and an alignment mark configured to be aligned with a center of a transmitting coil of a wireless power transmitter, where the alignment mark is not align with a center of the first receiving coil.

In an embodiment, an active stylus includes: an enclosure; a first ferrite core disposed inside the enclosure; a wireless power receiver that includes a first receiving coil wrapped around the first ferrite core between the first ferrite core and the enclosure; and an alignment mark configured to be aligned with a center of a transmitting coil of a wireless power transmitter, where the alignment mark is not align with a center of the first receiving coil.

One embodiment provides a method, including: detecting, at a wireless charger integrated into an electronic device, a connection of a wearable accessory device, wherein the wireless charger is positioned proximate to a probable user contact position; and transmitting, using the wireless charger and during a period when the connection is established, a charge to the wearable accessory device; wherein the wearable accessory device is worn by a user during the connection. Other aspects are described and claimed.

A timepiece is provided with a mechanical movement which includes a mechanical resonator, a sensor detecting oscillations of the mechanical resonator, and a braking device arranged to generate braking pulses in response to a control signal provided by a control circuit associated with an auxiliary oscillator. The control circuit is arranged to be capable of detecting a negative or positive temporal drift in the oscillation of the mechanical resonator and to generate, in a correction period, in association with the braking device, when the temporal drift corresponds to at least a certain loss, a series of braking pulses which are applied to the mechanical resonator at a frequency FSUP in a given range of values which is preferably higher than a frequency FZ (N)=2.Math.F0c/N, F0c being a set point frequency for the mechanical resonator and N a positive integer number.

A human motion energy harvesting apparatus embeddable in a wearable electronic device is provided. The apparatus may include a base; a first rotor disposed in a ring shape and connected to the base, the first rotor being rotatable circumferentially relative to the base, wherein a plurality of pairs of first permanent magnets may be disposed on a surface of the first rotor; an oscillating weight fixed coaxially with the first rotor; a second rotor disposed in a ring shape and coaxially connected to the base with the first rotor, the second rotor being rotatable circumferentially relative to the base, wherein a plurality of pairs of second permanent magnets may be disposed on a surface of the second rotor; a modulation ring fixed to the base coaxially with the first rotor between the first rotor and the second rotor; and a stator fixed to the base coaxially with the first rotor on a side of the second rotor opposite the first rotor, wherein a coil is arranged on the stator.

According to various embodiments, a watch may be provided. The watch may include: a timing circuit configured to provide information about a current time; a smart watch circuit configured to provide smart watch functionality; a first battery configured to provide energy to the timing circuit; a second battery configured to provide energy to the smart watch circuit; and a communication circuit configured to provide communication between the timing circuit and the smart watch circuit; wherein the communication circuit includes a safety circuit configured to prevent leakage of current from the first battery to the second battery.

According to various embodiments, a watch may be provided. The watch may include: a timing circuit configured to provide information about a current time; a smart watch circuit configured to provide smart watch functionality; a first battery configured to provide energy to the timing circuit; a second battery configured to provide energy to the smart watch circuit; and a communication circuit configured to provide communication between the timing circuit and the smart watch circuit; wherein the communication circuit includes a safety circuit configured to prevent leakage of current from the first battery to the second battery.