I had the alternator and the battery replaced yesterday but after 30 mins of driving the battery died again. Its like the battery won't hold a charge. Any help or ideas? Thanks in advance

 

You either have a bad alternator (can sometimes be bad from store) or you have something draining the battery, like a short somewhere in the wiring. Trace your positive and ground wires. Look for any bare wires, especially around the exhaust manifold area. Take a voltage meter to the terminals while the car is off, then while it's running, and see if it's getting a charge or slowly dies.