The battery of the electric water gun should be charged for about 5-6 hours.
A battery is an energy conversion and storage device that converts chemical energy or physical energy into electrical energy through reactions. A battery is a chemical energy source composed of two electrochemically active electrodes of different compositions, the positive and negative electrodes, respectively. The two electrodes are soaked in an electrolyte which can ensure the conduction of the support. When connected to an external medium, they convert their internal energy. chemical energy provides energy.