Abstract: A circulating charging/discharging device for an electric vehicle has a battery assembly, a switch, a controller, a power generator motor, a power generator and a wheel motor. The battery assembly has a charging module and a discharging module connected in parallel. The battery assembly has output terminals connected to the switch. The controller turns on/off the switch and controls operations of the electric vehicle. The power generator motor and the wheel motor connect to the battery assembly through the switch for receiving power from the battery assembly. The wheel motor drives the wheel of the vehicle to let the vehicle move. When the vehicle is started, the battery assembly transmits power to the power generator motor through the switch so that the power generator motor drives the power generator for generating power used for charging the battery assembly. Therefore, the battery assembly is charged when the vehicle is moving.

Abstract: A circulating charging/discharging device for an electric vehicle has a battery assembly, a switch, a controller, a power generator motor, a power generator and a wheel motor. The battery assembly has a charging module and a discharging module connected in parallel. The battery assembly has output terminals connected to the switch. The controller turns on/off the switch and controls operations of the electric vehicle. The power generator motor and the wheel motor connect to the battery assembly through the switch for receiving power from the battery assembly. The wheel motor drives the wheel of the vehicle to let the vehicle move. When the vehicle is started, the battery assembly transmits power to the power generator motor through the switch so that the power generator motor drives the power generator for generating power used for charging the battery assembly. Therefore, the battery assembly is charged when the vehicle is moving.

Abstract: A charger has a converter, a cigarette lighter adapter and a charger plug. The converter converts AC power to DC power and regulates a voltage range of the DC power to an appropriate range for charging portable electronic devices such as cell and smart phones and the like and has an output port and a plug. The cigarette lighter adapter has a cord extending from the cigarette lighter adapter and being electrically connected to the converter. The charger plug is detachably connected to the converter and has a cord extending from the charger plug and a connector being formed on the cord, corresponding to and being selectively mounted in the output port or in a socket of a computer. Therefore, a user can charge portable electronic devices in an automobile, electric socket or computer without carrying different chargers.

Abstract: An adjustable headset includes a headband and a pair of earpieces attached to the ends of the headband. A number of recesses are formed in a housing. The earpieces are attached to one end of the housing. A retaining device is coupled to the headband. A pair of pawls are formed on the retaining device and are engageable with either recess of the housing when the retaining device and the headband are inserted into the housing. The headband is adjustable relative to the earpieces by an engagement between the pawls and the recesses.