Can it be used while charging the battery? It can be used while charging the battery. However, please use the charger that came with the main unit. Related articles Given that it has waterproof abilities that are generally called "water resistant" (IP54), what is a rough guideline for its waterproof abilities? What is the difference between the modes of BALMUDA The Toaster? How long does BALMUDA The Kettle take to boil water? Do you need to put water in every cooking mode?