A power supply method includes the following steps: detecting whether a battery is installed in a system; delivering a control signal to a power conversion circuit by a controller when it is determined that the battery is not installed in the system; turning on part of a plurality of transistors and turning off the other part of the plurality of transistors by the power conversion circuit according to the control signal and a reference signal, so that an input voltage is delivered to a receiving terminal of the system from a sending terminal of the system through a current path.

A device and method are provided for saving power and electricity in a charging device including external power supplies and battery chargers having a primary circuit and a secondary circuit where a switch is located in the primary circuit and a current sensing device in the secondary circuit to sense when there is a drop in current in the secondary circuit or no current in the secondary circuit because the load such as a cell phone or tablet is charged and when this occurs the switch in the primary circuit is opened and the primary circuit no longer draws power from the source of power until the switch in the primary circuit is closed by either a user activating a switch to reenergize the charging device, where the switch may be powered by an on-board battery to close the primary circuit, or where a control circuit is activated by a program in the load or device to be charged, such that the charging device will cycle on and off according to an external app program residing on the device to be charged or some other device not attached to the controller.

A battery saving system (1) for an electrically powered mobility device (13) comprising a battery (15) and a drive control system (16) configured to be powered by the battery, wherein the battery saving system (1) comprises: a current monitoring circuit (3) configured to monitor a load current provided by the battery (15), wherein the current monitoring circuit (3) is configured to determine whether a load current magnitude is below a load current threshold level, a timer circuit (7) having a counter configured to successively count as long as the load current magnitude level is below the load current threshold level, and to reset the counter in the event that the load current level magnitude exceeds the current threshold level, and a disconnecting switch (9) configured to be operated between an open state and a closed state, wherein the timer circuit (7) is configured to trigger the disconnecting switch (9) to obtain the open state when the counter has reached a predetermined number to thereby disconnect the battery (15) from the drive control system (16).

A system and method includes a power control circuit for controlling first power from a power supply provided to a first circuit includes a first stage and a second stage. The first stage includes a low power energy detector and a first power switch. The low power energy detector is configured to provide second power via the first switch in response to energy. The second stage includes a signal detector configured to detect a characteristic of a signal associated with the energy in response to the second power. The signal detector is configured have the first power provided to the first circuit in response to the characteristic being detected.

Disclosed is a connection apparatus capable of supplying power supplied from a power supply module to a load. The connection apparatus includes: a connection unit connectable with the power supply module; a light emission element; and a light emission controller for controlling the light emission element, wherein the light emission controller causes, upon detection of a connection of the power supply module to the connection unit, the light emission element to emit light for a first predetermined time.

A device and method are provided for saving power and electricity in a charging device including external power supplies and battery chargers having a primary circuit and a secondary circuit where a switch is located in the primary circuit and a current sensing device in the secondary circuit to sense when there is a drop in current in the secondary circuit or no current in the secondary circuit because the load such as a cell phone or tablet is charged and when this occurs the switch in the primary circuit is opened and the primary circuit no longer draws power from the source of power until the switch in the primary circuit is closed by either a user activating a switch to reenergize the charging device, where the switch may be powered by an on-board battery to close the primary circuit, or where a control circuit is activated by a program in the load or device to be charged, such that the charging device will cycle on and off according to an external app program residing on the device to be charged or some other device not attached to the controller.

Apparatus, methods, and systems according to which shutdown features are provided to battery-powered electronics. An automatic shutdown device detects periods in which the battery-powered electronics are motionless using a sensor and, based on such detection, disconnects the battery from the battery-powered electronics using an electronic switch, rendering the battery-powered electronics inoperable. In addition, the automatic shutdown device is able to reenergize the battery-powered electronics using the electronic switch once motion is detected by the sensor so that the battery-powered electronics can resume normal operations. In several embodiments, the battery-powered electronics include a keyless fob associated with a vehicle and the automatic shutdown device is part of a vehicle theft prevention system.

A power supply device includes a power output terminal, a power converter and an electronic circuit breaker. In view of operation of the electronic circuit breaker, when an electric appliance that acts as a load is connected between the power output terminal and a ground terminal, the electronic circuit breaker is activated to output voltage from the power converter to the power output terminal so as to charge the electric appliance. When the electric appliance is done with charging and is removed, the electronic circuit breaker is deactivated to prevent voltage of the power converter from being outputted to the power output terminal. Thus, even if the power output terminal is exposed, the power output terminal won't output power to result in electric shock because of users' inadvertent contact when no electric appliance is being charged, thereby enhancing operational safety.

A power supply method includes the following steps: detecting whether a battery is installed in a system; delivering a control signal to a power conversion circuit by a controller when it is determined that the battery is not installed in the system; turning on part of a plurality of transistors and turning off the other part of the plurality of transistors by the power conversion circuit according to the control signal and a reference signal, so that an input voltage is delivered to a receiving terminal of the system from a sending terminal of the system through a current path.

Apparatus, methods, and systems according to which shutdown features are provided to battery-powered electronics. An automatic shutdown device detects periods in which the battery-powered electronics are motionless using a sensor and, based on such detection, disconnects the battery from the battery-powered electronics using an electronic switch, rendering the battery-powered electronics inoperable. In addition, the automatic shutdown device is able to reenergize the battery-powered electronics using the electronic switch once motion is detected by the sensor so that the battery-powered electronics can resume normal operations. In several embodiments, the battery-powered electronics include a keyless fob associated with a vehicle and the automatic shutdown device is part of a vehicle theft prevention system.