Abstract: An apparatus comprises one or more image catching and sound reading assemblies each adapted to catch images and read sound, convert the images and the sound into image and sound signals, and send the image and sound signals in electromagnetic waves; and a power supply assembly distal from the image catching and sound reading assemblies and including a receiver circuit having an associated antenna for receiving electromagnetic waves containing the image and sound signals from the image catching and sound reading assembly and sending the processed images and sound signals to an AV player for display and broadcasting, and power supply means for supplying power to the AV player. The invention enables a user to monitor a person's (or persons') activities by watching screen of the AV player and listening to broadcasted sound.

Abstract: A portable power supply includes a first shell, a second shell disposed on the first shell, an electronic device removably disposed in the first shell, a power supply assembly disposed in the second shell, a power indicator disposed on the second shell for displaying remaining power of the power supply assembly, a charging socket, a power socket for connecting to and supplying power to the electronic device, a computer port for communicating data between a computer and the electronic device, and a switch. The power supply assembly includes a rechargeable battery, a battery switching device, a booster circuit, a charging circuit, a battery protecting circuit, and a battery power sensing circuit.

Abstract: Provided is a portable power supply enclosed in a housing including first and second compartments. The power supply comprise a power supply assembly disposed in the second compartment, a rechargeable battery received in the first compartment for supplying power to an electronic device held by the second compartment, a power indicator disposed on a top of the second compartment for displaying remaining power of the power supply assembly, a charging socket disposed in the second compartment for electrically interconnecting to a charger in the power supply assembly, a power socket disposed in the second compartment for connecting to and supplying power to the electronic device, and a plurality of ports disposed on the second compartment, each port adapted to communicate data with an external computer coupled thereto.

Abstract: An apparatus comprises one or more image catching and sound reading assemblies each adapted to catch images and read sound, convert the images and the sound into image and sound signals, and send the image and sound signals in electromagnetic waves; and a power supply assembly distal from the image catching and sound reading assemblies and including a receiver circuit having an associated antenna for receiving electromagnetic waves containing the image and sound signals from the image catching and sound reading assembly and sending the processed images and sound signals to an AV player for display and broadcasting, and power supply means for supplying power to the AV player. The invention enables a user to monitor a person's (or persons') activities by watching screen of the AV player and listening to broadcasted sound.

Abstract: A portable power supply comprises a first compartment, a second compartment disposed on the first compartment, an electronic device removably disposed in the first compartment, a power supply assembly disposed in the second compartment, a power indicator disposed on the second compartment for displaying remaining power of the power supply assembly, a charging socket, a power socket for connecting to and supplying power to the electronic device via a cord, and a computer port for connecting to a computer via a cable for communicating data between the computer and the electronic device. The power supply assembly comprises a battery, a battery switching member, a booster circuit, a charging circuit, a battery protecting circuit, and a battery power sensing circuit.