Abstract: A charging system with an enhanced charging efficiency has two connectors each having multiple connection points, which are connected between multiple chargers and multiple rechargeable batteries. The chargers are connected to one of the connectors through multiple first connection wire sets. The other connector is connected to the rechargeable batteries through multiple second connection wire sets. Output terminals of the chargers and the positive and negative terminals of the rechargeable batteries are respectively connected to the connectors. Thus, the chargers receive power through a power input port and output power converted thereby to the rechargeable batteries through single-port connection of the connectors in a one-to-one fashion to achieve the purpose of simultaneously and efficiently charging multiple rechargeable batteries and providing operational convenience because of the easy and convenient connection of the connectors.

Abstract: A multifunctional emergency rescue device includes a main control circuit, a selection switch, an indicator lamp, an annunciator, a battery unit, a connection port module, an external power input socket and output socket. The main control circuit contains a micro control unit (MCU), a power sensing unit, a rectifier and regulator unit, a monitoring unit, and a vibration induction unit. When the selection switch is switched to a first working mode, recharging, rescue, a stable operation to a car electric system are performed. When a second working mode is switched to, electronic devices are recharged at the USB port and the LED lighting lamp illuminates. When a third working mode, an emergency mode, is switched to, the vibration induction unit generates a signal determined by the MCU to drive the annunciator to generate an alarm sound, achieving functions of emergency calling, disaster calling and burglar-proof calling.

Abstract: A multifunctional emergency rescue device includes a main control circuit, a selection switch, an indicator lamp, an annunciator, a battery unit, a connection port module, an external power input socket and output socket. The main control circuit contains a micro control unit (MCU), a power sensing unit, a rectifier and regulator unit, a monitoring unit, and a vibration induction unit. When the selection switch is switched to a first working mode, recharging, rescue, a stable operation to a car electric system are performed. When a second working mode is switched to, electronic devices are recharged at the USB port and the LED lighting lamp illuminates. When a third working mode, an emergency mode, is switched to, the vibration induction unit generates a signal determined by the MCU to drive the annunciator to generate an alarm sound, achieving functions of emergency calling, disaster calling and burglar-proof calling.

Abstract: A battery car anti-theft device, which is mainly characterized in utilizing an electronic control circuit to control the external power supply state of a battery, and when set in the anti-theft state, if it is detected that the supply current is greater than a preset value, then the entire external power supply of the battery is immediately cut off, thus, there is no power supply to start the engine to enable the car thief to drive the vehicle away, thereby achieving the objective of preventing the vehicle from being stolen.

Abstract: A battery protection device which utilizes light current to control heavy current primarily uses an electronic control circuit of light current in combination with a large current control element, such as a relay, to protect large current recharging and discharging of a battery. The light current electronic control circuit includes three main circuits: a main control (micro control unit) circuit, a sampling circuit and a relay control circuit. The relay is primarily a latching relay, allowing the relay to have a self-locking function after operation, without continually supplying electricity to a solenoid.