New Delhi, April 13 -- Regular savings accounts require customers to maintain a minimum average balance (MAB). Generally, banks charge a penalty on non-maintenance of MAB in your saving accounts. The MAB amount and the penalty differ across banks, and also depends on the type of bank account you have. State Bank of India (SBI), Bank of Baroda (BoB) and other leading banks have fixed their monthly minimum average balance requirements according to the location of a customer's account. Banks also charge a penalty from customers who fail to maintain an average monthly balance in their savings account. The penalty varies on factors such as the location of a branch. The MAB is calculated by taking into account the balance maintained in an account on all days of the month....