Abstract: A bathing device for washing people's body has a cleaning head comprising a suction housing, a liquid injection assembly inside said suction housing, and a control valve assembly, together with associated accessories. The control valve assembly comprises a valve and an electrical switch, allowing an operator to close said control valve to start spraying cleaning fluid onto person's body and removing said fluid with vacuum, and to open said control valve in said control valve assembly to discontinue spraying cleaning fluid onto person's body and releasing vacuum in said suction housing to facilitate free move of said cleaning head. The bathing device can clean person's body like taking a bath or shower without spilling water to adjacent area and the need for the person taking off clothes, and further at any place of person's convenience or choice.

Abstract: A metal-air battery includes an anode portion comprising at least a metal gel and an electrolyte. A mesh screen is disposed on the anode portion. The mesh screen is configured for substantially holding the metal gel within the anode portion. A cathode portion includes at least a current carrier and a cathode catalyst. A separator is disposed between the anode portion and the cathode portion for mitigating leakage of the electrolyte. A gate device is disposed between the anode portion and the cathode portion. The gate device has an open state to enable a contact of the anode portion and the cathode portion for activating a generation of electrical power, and a closed state to separate the contact of the anode portion and the cathode portion to inhibit the generation of electrical power for storing the metal-air battery.

Abstract: The metal-air battery system of this invention has a detachable anode compartment and cathode compartment for producing electric current, wherein the anode compartment and the cathode compartment are pressed into contact when the battery is put in use to generate electric power; and the anode compartment and the cathode compartment are separated when the battery is not in use to generate electric power. The anode compartment also has an injection device to inject water mist to maintain the moisture level of the metal gel inside the anode compartment. The metal-air battery system of this invention will extend the battery storage life significantly as compared to conventional metal-air battery. In addition, the metal-air battery system of this invention makes replacing anode conveniently so that the battery system can be re-used continuously.