To set the stage for a recal, you have to understand that the Insight can't measure the charge in the battery like it can fuel in the tank. It depends on sensors to estimate the charge left. Over a period of time, the actual charge will begin to sway from the sensor's estimates. When the computer finally determines the battery is really dead even though your battery gauge doesn't, a recal happens. The battery indicator suddenly drops to zero charge and the car begins to force charge. This is normal and the interval of recals depends on temperature and driving style. The harder you drive, the more recals you will probably get. Also, you will get more in the summer since heat doesn't play nice with the batteries. Older batteries will also have more recals than new one's.