A wireless earphone may include a first group of contact electrodes, an earphone module, a power module, and a control module. The contact electrodes contact a second group of contact electrodes of a charger to establish an electrical connection between the wireless earphone and the charger. The earphone module outputs a sound signal. The power module provides operating power to the earphone module. The power module is charged from the charger via the first group of contact electrodes. The control module is configured to: in response to establishment of the electrical connection between the wireless earphone and the charger, perform control to prohibit charging the power module using charging power from the charger within a first time period; and after expiration of the first time period, perform control to allow charging the power module using the charging power from the charger.

A battery system with an integrated circuit and a battery group is provided. The integrated circuit has a first terminal to receive a power supply voltage, a second terminal coupled to a reference ground, a first cell terminal operable to be coupled to a cathode of a first battery cell through a first connection line, a second to (n+1)th cell terminals operable to be respectively coupled to an anode of the first battery cell to an anode of a nth battery cell of the battery group through a second to (n+1)th connection lines; a first switch coupled between the first cell terminal and the second terminal, a second to (n+1)th switches operable to be respectively coupled in parallel with the first to nth battery cells of the battery group, a (n+2)th switch coupled between the first terminal and the (n+1)th cell terminal.

An electronic device is provided. The electronic device includes a housing, a wireless charging circuit, memory, comprising one or more storage media, storing instructions, and at least one processor communicatively coupled to the wireless charging circuit and the memory, wherein the instructions, when executed by the at least one processor individually or collectively, cause the electronic device to identify a mounting of an external device on the housing, identify a first charging mode, based on the mounting of the external device, identify the first charging mode as a preferred charging mode from among a plurality of charging modes including the first charging mode, receive a first ping signal from a wireless power transmission device via the wireless charging circuit, transmit, to the wireless power transmission device via the wireless charging circuit, information indicating that the first charging mode is supported, based on receiving the first ping signal, and receive first charging power from the wireless power transmission device via the wireless charging circuit based on the first charging mode and based on the wireless power transmission device supporting the first charging mode.

Disclosed is a handheld fan, which includes a holding part, a fan head and a control device. The holding part is provided with an accommodating space inside, and is equipped with a discharge port and a charging port. The discharge port is configured for electrical connection to an external electronic device, while the charging port is for electrical connection to an external power source. The fan head is provided with a motor and fan blades connected to the motor, and the fan head is connected to the holding part. The control device is located in the accommodating space and includes a power module, a processor, a charging circuit, and a current output circuit. With the above structure, the handheld fan has controllable charging and discharging, external power supply capability, and adjustable wind speed.

A battery storage system includes a multilevel-converter and a plurality of storage sections. Each storage section includes at least one holding means configured to hold at least one battery and at least one cable with at least one connector configured to electrically connect at least one of the batteries. The multilevel-converter includes a plurality of converter modules connected in series with each other and each converter module has at least one bypass switch configured to bypass the converter module and a battery switch configured to disconnect the battery at the same time when the bypass switch is on. The battery storage system further includes a controller with means for detecting the presence of a battery in each storage section and means for configuring the switches of the plurality of converter modules based on the presence of batteries such that the plurality of converter modules provides a required voltage.

A charging control method, a non-transitory computer-readable storage medium, and a cleaning robot are provided. The method includes: detecting a charging status of the cleaning robot; in response to detecting that the cleaning robot is being charged, braking and locking the cleaning robot; monitoring a preset unlocking trigger operation, the preset unlocking trigger operation includes at least one of: rotation of the driving wheel under action of an external force, the cleaning robot completing charging, or the cleaning robot receiving an instruction for indicating to start a cleaning mode; in response to monitoring the preset unlocking trigger operation, unlocking the driving wheel; where monitoring the preset unlocking trigger operation includes: monitoring a status of the driving wheel; and in response to monitoring that the driving wheel rotates, determining that the unlocking trigger operation is detected.

The present disclosure provides a jump start circuit, a jump starter and a jump start device. The jump start circuit includes: a switch module and a voltage fluctuation detection module. The jump start circuit further has a first input terminal, a second input terminal, a first output and a second output. The voltage fluctuation detection module is configured to electrically connect to at least one of the first input terminal, the first output and the branches between the first input terminal and the first output at a connection point, and voltage fluctuation detection module is configured to detect the electric potential fluctuation at the connection point. When the detected electric potential fluctuation reaches the fluctuation threshold, the voltage fluctuation detection module outputs a starting identification signal. Under a triggering of the starting identification signal, the switch module remains in an ON state.

Cable failure protection and battery kickstart in an electronic device is provided. When the electronic device is attached to an external power supply via a universal serial bus type-C (USB-C) cable, it is important to protect the electronic device from being damaged by a cable failure (e.g., overcurrent, overtemperature, and/or faulty cable). Additionally, when a battery in the electronic device is fully depleted, it is necessary to kickstart recharging of the depleted battery upon attaching to the USB-C cable. Herein, a power management integrated circuit (PMIC) is provided in the electronic device and configured in accordance with the USB-C standard to protect the electronic device from the cable failure and kickstart recharging of the depleted battery. By integrating cable failure protection and battery kickstart functionalities into the PMIC, it is possible to reduce cost and footprint of the PMIC, thus making the PMIC suitable for small formfactor electronic devices.

A battery system for allowing discharge of batteries in parallel and charging in series, while eliminating or reducing the risks and damage associated with short circuits, includes first and second batteries, parallel contactors electrically connecting the batteries in parallel to a high voltage bus when they are closed, a mid-contactor electrically connecting the batteries in series when the mid-contactor is closed, and a logic circuit for preventing closure of the mid-contactor when any of the parallel contactors is closed.