An electric hair cutting device including a housing having a first end and a second end opposite the first end, a bladeset mounted to the housing at the first end, the bladeset having a stationary blade and a reciprocating blade, an electric motor electrically connected to a power source within the housing, a drive shaft operatively connecting the electric motor to the reciprocating blade, a control module within the housing which controls a rotational speed of the electric motor; and a trigger which sends an actuation signal to the control module based on a partial actuation of the trigger between a minimum actuation and a maximum actuation, the control module adjusting a rotational speed of the electric motor based on the actuation signal. A related charging stand is provided that is compatible with the hair cutting device and features a digital display of device parameters.

A mobile device management system includes a controller and a charging bay device charging slots and charging circuitry accessible through charging slot apertures, wherein each charging slot is configured to receive and automatically charge one of the plurality of portable computing devices. A locking mechanism is operable automatically by the at least one controller to secure the one or more of the plurality of portable computing devices. The locking mechanism is also operable manually for removal of one or more of the plurality of portable computing devices.

Methods, systems, and devices related to a portable charging case are described. For example, a portable charging case is described that may convert a ring size-specific charger for a wearable ring device into a portable charger. The portable charging case may include a housing with a bottom portion that houses a battery and related circuitry, a top portion, and a retaining bracket that may hold the ring size-specific charger in a cavity within the bottom portion. The portable charging case may include a power providing component that may transfer charge from the battery to the ring size-specific charger. A user may accordingly place the ring size-specific charger within the cavity such that a power-receiving component of the ring size-specific charger is coupled to the power providing component of the portable charging case, which may enable the user to charge the wearable device without use of a wall outlet.

A battery powered wireless power transmitter may be used to charge a mobile device using wireless power. Such a wireless mobile device charger may include: a housing omitting any electronic ports or electrical contacts; a rechargeable battery disposed within the housing; an electronic power receiver disposed within the housing, the power receiver powered by an external source and through which the battery is wirelessly charged; and an electronic power transmitter disposed within the housing, the power transmitter powered by the battery to wirelessly transmit electrical power.

A battery pack charger includes a housing, a plurality of battery receptacles supported by the housing each configured to receive a battery pack, a plurality of output power supplies, a plurality of charging circuits configured to transmit power from one of the plurality of output power supplies to one or more of the plurality of battery receptacles, a plurality of switches included in the plurality of charging circuits, and a controller. The controller is operable to receive signals from charging circuits that are indicative of battery packs being received by each of the battery receptacles, control the plurality of switches to one of a first position or a second position based on the input, and provide one of a first output power and a second output power to each of the battery pack receptacles.

A system for intelligent initiation of an inductive charging process is provided. In accordance with an embodiment, the system comprises a receiver coil or receiver associated with a mobile device, and provided as a separable or after-market accessory for use with the mobile device. When the mobile device is placed in proximity to a base unit having one or more charger coils, the charger coil is used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device. The base unit and mobile device communicate with each other prior to and/or during charging or powering to determine a protocol to be used to charge or power the mobile device.

A charging equipment includes a charging bracket and a mobile power source. The charging bracket includes a base and a first supporting portion, and a first magnetic attraction member and a first charging plug are arranged on the first supporting portion. A second magnetic attraction member and a second charging plug are arranged on the mobile power source. The mobile power source is detachably connected to the charging base through a mutual magnetic attraction between the second magnetic attraction member and the first magnetic attraction member. The second charging plug is configured for being electrically connected to the first charging plug, so that the mobile power source is charged.

Accessory cases that can be charged using one or more types of wireless chargers. An example can provide an accessory case having a first alignment feature for aligning to a first type of wireless charger. The first alignment feature can include one or more magnetic elements in the accessory case. The one or more magnetic elements can be located in both the base and the lid of the accessory case. Another example can further include a second alignment feature for aligning to a second type of wireless charger. The second alignment feature can include one or more magnetic elements in the accessory case.

Configurable kiosk devices for correctional facilities flexibly accommodate any number n of tablet computer devices with secure access measures, safeguards, and accounting needed by correctional facilities with capability of real-time management and oversight. Intelligent battery charging capability and energy conservation features are incorporated in relatively compact, and space saving kiosk configurations. Retrofit reconfiguration of the kiosk device is possible at relatively low cost to accommodate additional numbers of tablet computer devices and different sizes of tablet computer devices.

A comprehensive tablet charging system with solutions characterized by multiple embodiments covering critical use cases in correctional applications. Specifically, hardware hardened cabinet design, flexible design for portal cart and wall mount, guard rail slot design to support movable and replaceable charging trays, flexible configuration designs to support multiple device charging many tablets, heat management design for effective heat dissipation especially for wireless charging, power management design for power conversion, wireless charging compatibility, over current protection, and DC connecter based power interface.