Car electric kettle can be used safely, there is no problem to boil water:
1, the frequency converter is plugged into the cigarette lighter, and then add a 220 volt socket on it, you can connect 220 volt electrical appliances;
2, as long as the power of the electrical appliance does not exceed the power of the inverter, it can be used normally;
3. However, please note that due to the use of car batteries, the battery will be powered off, aggravating the damage of the battery, and the water boiling current is large, which is easy to cause the line heat fire.
It's not strictly safe. Car electric kettle is not recommended. People should be nearby when using.