Write a Python program that calculates the estimated charging time in hours for an electric scooter with a battery capacity between 120 and 480 watt-hours (Wh).

Your program should:

• Keep asking the user to enter a battery capacity in Wh until they enter a value that is between 120 and 480 (inclusive).
• Calculate the base charging time in hours by dividing the battery capacity by 120.
• Ask the user if they are using a fast charger (expecting the user to enter 'yes' if they are).
• If they are using a fast charger, divide the base charging time by 2.
• Output the final calculated charging time.

You should use meaningful variable names, correct syntax, and indentation in your answer.