1. The heating time of the heating coaster is greatly affected by its power. If the power of the coaster is high, the heating speed will be faster, otherwise it will be slower. Generally, the working power of heating coasters is 20w, and it takes about 5-7 minutes to heat a glass of water.

2. The thickness of the cup placed on the heating coaster will also affect its heating speed. For example, a thick ceramic cup takes longer to heat than an ordinary cup.

3. Heating different liquids will lead to different heating times. Such as water, milk, coke and so on. It is normal that it takes different time.