This situation depends on the product.
The output voltage of the battery used in electric water guns varies from product to product. Generally speaking, the battery output voltage required for an electric water gun is usually around 4.5 volts. Since the electric water gun must drive the motor to spray water, its battery must provide some electrical assistance. In actual production, three dry batteries are generally used for power supply in series to achieve sufficient output voltage and current.
It should be noted that although the battery output voltage of the toy electric water gun is relatively low, you should still be careful when using it to avoid connecting batteries to the mix or mix different types of batteries to avoid causing equipment damage or hazardfor the safety. In addition, when replacing batteries, it is necessary to choose batteries of conventional brands and reliable quality, and treat and recycle them properly to reduce environmental impact and waste of resources.