Disclosed is a wireless headset role switching method, relating to the technical field of portable listening devices, wherein a main wireless headset is a headset currently establishing a connection with a terminal, and a slave wireless headset is a headset not currently establishing a connection with the terminal. The method includes: when receiving an in-place instruction, a main wireless headset sending connection information of the main wireless headset and a terminal to a slave wireless headset, so that the slave wireless headset initiates a connection request to the terminal according to the connection information and establishes a connection with the terminal, thereby completing wireless headset role switching. Also disclosed are a wireless headset, a wireless connection device role switching method, a TWS headset and a computer-readable storage medium, having those beneficial effects.

A system configured to perform operations to receive, via a network communication interface, an indication of a power event occurring at a first device. The first device is for an online identity. The power event causes the first device to switch from an external power source to an internal battery. The first device represents that the online identity is online while the first device receives power from the internal battery. The system is further configured to perform operations to hold, at a second device, at least one status update for an online contact of the online identity while the first device receives power from the internal battery. Furthermore, the system is configured to perform operations to release, for transmission to the first device, the at least one status update in response to determining that the first device switches back to the external power source.

A method of selecting primary and secondary cellular networks for a vehicle comprises measuring cellular connectivity parameters for cellular communication between a first subscriber identity module (SIM) and a first cellular network and for cellular communication between a second SIM and a second cellular network, comparing measured cellular connectivity parameters for the first SIM to measured cellular connectivity parameters for the second SIM, designating one of the first SIM and the first cellular network and the second SIM and the second cellular network as a primary network, and designating the other one of the first SIM and the first cellular network and the second SIM and the second cellular network as a secondary network, measuring cellular connectivity parameters for the primary and secondary networks, comparing the measured cellular connectivity parameters for the primary and secondary networks, switching designation of the primary and secondary network based on measured cellular connectivity parameters.

A server device is provided, the server device comprising a processing circuitry, a memory circuitry, an interface circuitry configured to connect to a communication network. The server device is configured to obtain machine data indicative of one or more features of a machine. The machine is configured to be powered by a battery device. The server device is configured to obtain usage data indicative of a usage of the machine. The server device is configured to obtain, for one or more battery devices, battery data indicative of one or more battery parameters of a battery device. The server device is configured to determine, for the one or more battery devices, a predicted impact on the one or more battery parameters based on the battery data, the usage data, and the machine data.

A status monitoring system and the devices used for the status monitoring system is disclosed. The status monitoring system includes a controller device, a plurality of rod monitoring devices, and a motor monitoring device which works together to provide a layered approach to securing the boat. The controller device is configured to communicate with a smart device via cellular network. The controller device triggers an alert once it detects unexpected events on the boat or receives intrusion notifications from other devices in the status monitoring system. Unexpected events can include the boat moving out of the geofence, boat vibration, and unexpected starting of the vehicle. A method for monitoring the status of the boat is also disclosed. The method can include receiving an activation signal, receiving a GPS signal, receiving vibration signals, energizing the siren and transmitting notification and boat location to the cloud when detecting at least one trigger.

An accessory for a mobile device includes a battery pack comprising a battery, battery pack memory, and battery data stored in the battery pack memory. The battery is an auxiliary power source for the mobile device when the accessory is electrically coupled to the mobile device. The accessory additionally includes accessory memory and accessory data stored in the accessory memory. The accessory data and the battery data may be obtained by the application on the mobile device when the accessory is electrically coupled to the mobile device.

A method of selecting primary and secondary cellular networks for a vehicle comprises measuring cellular connectivity parameters for cellular communication between a first subscriber identity module (SIM) and a first cellular network and for cellular communication between a second SIM and a second cellular network, comparing measured cellular connectivity parameters for the first SIM to measured cellular connectivity parameters for the second SIM, designating one of the first SIM and the first cellular network and the second SIM and the second cellular network as a primary network, and designating the other one of the first SIM and the first cellular network and the second SIM and the second cellular network as a secondary network, measuring cellular connectivity parameters for the primary and secondary networks, comparing the measured cellular connectivity parameters for the primary and secondary networks, switching designation of the primary and secondary network based on measured cellular connectivity parameters.

A case for portable electronic devices including smartphones includes a feature to prevent glare from a flash from affecting images and video captured by a camera lens and also a battery to extend battery life of the electronic device. Smartphones have telephony, Internet connectivity, and camera and video features. Photos and video can be uploaded through the Internet or sent to other phones. The case has a hole for a camera flash of the smartphone to pass through. The edging of the hole is colored black or another dark color to prevent glare from appearing in the photos or video taken by the smartphone when using the camera flash.

An electronic lock can enter a lockdown mode in response to a lockdown command comprising a mechanical command, e.g. a button or door handle being pressed on the lock in a predefined time-series sequence, or touching the lock in a time-series sequence). Alternatively, an audio or visual command can be issued, e.g. saying certain words or making a hand gesture. The lock may require additional authentication before executing the lockdown command, e.g. recognizing an authorized electronic key. Other embodiments are also provided.

A cellular modem is configured for low power applications. In some instances, the cellular modem includes a transceiver, a processor to control the transceiver, a memory device in communication with the processor, and a general-purpose input/output (GPIO) pin, controlled by the processor. In an example, the cellular modem receives an appointed time for an upcoming communication and determines a time to activate a power supply. The determination may be based at least in part on the appointed time for the communication, so that the power supply is ready to supply power at a level consistent with use of the transceiver at the appointed time of the communication. At the determined time, a signal from the GPIO pin is used to activate the power supply, resulting in an increase in power supplied to the cellular modem in a just-in-time manner.