@Pooja1987 ji,
Minimum 4 times a day is prescribed for normal use, the energy intake should be increased or decreased as per the situation.
There is no method to find out how much amount of energy is required for a wish so please go with the maximum u can.
Mostly VK users use seperate water bottles for different energy combination as per need.
You can also use that.
Secondary u can also charge food items , tea, coffee, clothes, and other usable items with VK.