Abstract: A gas extraction device for metal mineral inclusions and a gas extraction method therefor are provided, the device includes a base plate, an annular carrier, sealing covers, a grinding assembly, a vacuum assembly, a gas-gathering assembly and a mass spectrometer. The annular carrier is disposed on the base plate, multiple grinding chambers are defined and evenly distributed in a circular shape on the annular carrier, the sealing covers are disposed at openings of the grinding chambers, the grinding assembly includes grinding hammers, and the grinding hammers penetrate through the sealing covers and extend into the grinding chambers. Side walls of each grinding chamber defines a first through hole and a second through hole. The vacuum assembly is communicated with the grinding chambers through the first through holes. The gas-gathering assembly is communicated with the grinding chambers through the second through holes. The mass spectrometer is communicated with the gas-gathering assembly.

Abstract: An electronic device includes a current detection module, two path switches, a processing unit, and two control circuits. Two terminals of the current detection module are connected to an external power port and a battery. The two path switches are connected to the two terminals. A first control circuit is connected to the processing unit and to one path switch. A second control circuit is connected to the processing unit and to another path switch. When the electronic device is powered on, whether using power from the battery or from the external power port, the device can analyze the power consumed by the functioning parts of the device, including (when power is taken from the external power port) the amount of current taken in charging the battery.

Abstract: An electronic device includes a current detection module, two path switches, a processing unit, and two control circuits. Two terminals of the current detection module are connected to an external power port and a battery. The two path switches are connected to the two terminals. A first control circuit is connected to the processing unit and to one path switch. A second control circuit is connected to the processing unit and to another path switch. When the electronic device is powered on, whether using power from the battery or from the external power port, the device can analyze the power consumed by the functioning parts of the device, including (when power is taken from the external power port) the amount of current taken in charging the battery.

Abstract: An electronic device includes a control unit, a battery and a charging current setting unit. The control unit is used to detect a DC voltage of a charger, compare the DC voltage with a predetermined charging voltage minimum, and output a current initializing signal and a current increasing signal to the charging current setting unit. The charging current setting unit is used to adjust a charging current according to signals generated by the control unit and output the adjusted charging current to the battery.

Abstract: A data card includes a main chip, a switch, and an input/output interface. The input/output interface receives a voltage signal and a control signal, and transmits the voltage signal and the control signal to the switch. When the control signal is a first control signal, the switch switches on, and the voltage signal is transmitted to the main chip via the switch, causing the main chip to enable a universal serial bus (USB) function of the data card. When the control signal is a second signal, the switch switches off, and no voltage signal is supplied to the main chip, causing the main chip to disable the USB function.