The safe use of a kettle is the
“Use of water less than 70% of kettle size”.
To prevent any accidental injury, use the proper amount of water in the kettle.
Even if you use kettle with an alarm function, there will be any accidental injury if you do not use the proper amount of water.
[Kettle size and Example of the proper capacity]
5 Liter Kettle size does not mean 5 Liter of water fills kettle
Therefore, if you purchase 5 Liter kettle, you can boil around 3.5 Liter water. If you want to boil 5 Liter water, you might purchase 7 Liter kettle.
These days, the lid of kettles including whistling function, so the lid does not move easily to the boiling pressure.
When the lid is fixed, the pressure will be getting high because of boiling water. Then the water which is not proper amount will flow out through spout.
If it is on high heat, the risk will be doubled.
You can use the kettle safely and conveniently with the right amount of water.