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.