Hello. I hope someone here can help. I've had my MBP (15" mid 2010 2.66 GHz Intel Core i7 4 GB 1067 MHz DDR3 NVIDIA GeForce GT 330M 512 MB) since 5/10 without any problems. Yesterday while streaming a movie the critical battery warning came on the screen. I checked the power supply and the led wasn't lit up. After checking that the connection was secure and the electrical outlet was ok, I tested the power supply on a different MBP. It started charging correctly. Later I reconnected the PS to my MBP and it started to charge. Afterward, while streaming a movie the system shut down completely without warning. I've got an appt w/ apple but any information before will be helpful. If their tech gives me a song and dance I'd like to have my 2-step ready. Thank you!