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 standby circuit includes a power regulator configured to operate in an ON state and an OFF state; a power detecting circuit configured to detect power of a load; an integrated circuit module including two interfaces, each of the two interfaces configured to receive an ON operating command or an OFF operating command from a remote control device; and a proximity detection circuit configured to determine a proximity of each of the two interfaces to the remote control device.

A working method of a modular uninterruptible power supply (UPS) includes: obtaining working parameters of the modular UPS, where the working parameters include an input voltage parameter, a load parameter, and a battery parameter; and adjusting a working mode of a power module in the modular UPS according to at least one of the working parameters of the modular UPS, so that not all power modules are in a same working mode, where the modular UPS includes K working modules, and 2≤K.

Provided is a battery charger. The battery charger comprises a power converter, an input power connector, and an output power connector. The input power connector is configured to be connected to a power source such that the input power connector is arranged between the power converter and the power source. The output power connector is configured to be connected to an electronic device such that the output power connector is arranged between the power converter and the electronic device. The battery charger further includes a power control relay configured to connect the power converter to the input power connector. The battery charger further includes a timer device configured to disconnect the power converter from the input power connector after a predetermined amount of time has elapsed.

A standby circuit includes a power regulator configured to operate in an ON state and an OFF state; a power detecting circuit configured to detect power of a load; an integrated circuit module including two interfaces, each of the two interfaces configured to receive an ON operating command or an OFF operating command from a remote control device; and a proximity detection circuit configured to determine a proximity of each of the two interfaces to the remote control device.

A standby circuit includes a power regulator configured to operate in an ON state and an OFF state; a power detecting circuit configured to detect power of a load; an integrated circuit module including two interfaces, each of the two interfaces configured to receive an ON operating command or an OFF operating command from a remote control device; and a proximity detection circuit configured to determine a proximity of each of the two interfaces to the remote control device.

A standby circuit includes a power regulator configured to operate in an ON state and an OFF state; a power detecting circuit configured to detect power of a load; an integrated circuit module including two interfaces, each of the two interfaces configured to receive an ON operating command or an OFF operating command from a remote control device; and a proximity detection circuit configured to determine a proximity of each of the two interfaces to the remote control device.

Provided is a battery charger. The battery charger comprises a power converter, an input power connector, and an output power connector. The input power connector is configured to be connected to a power source such that the input power connector is arranged between the power converter and the power source. The output power connector is configured to be connected to an electronic device such that the output power connector is arranged between the power converter and the electronic device. The battery charger further includes a power control relay configured to connect the power converter to the input power connector. The battery charger further includes a timer device configured to disconnect the power converter from the input power connector after a predetermined amount of time has elapsed.

A standby circuit includes a power regulator configured to operate in an ON state and an OFF state; a power detecting circuit configured to detect power of a load; an integrated circuit module including two interfaces, each of the two interfaces configured to receive an ON operating command or an OFF operating command from a remote control device; and a proximity detection circuit configured to determine a proximity of each of the two interfaces to the remote control device.