Recently on one of my more spirited drives I came across a large pothole on a back road and hit it. There was no cosmetic damage however, I noticed that there is now a red battery light on my dash that will occasionally go away if I hit another bump. Thinking perhaps I snapped the accessory belt I checked if I had power steering, which I do. The battery is only 3 months old so I ruled that out. The alternator is the next thing that comes to mind, however after letting it sit for about 30 minutes idling I turned the car off and tried to crank it over expecting the battery to be dead, but it started just fine. Anyone have any idea what's broken that's causing this? Thanks for the replies in advance!