Acer Aspire 4310, 4315, 4710, 4710Z, 4715, 4715Z, 4920, 4920G, Travelmate 2490 50.4T901.001 50.4T901.011 50.4U901.012 50.4T901.021 50.4T901.012 50.4T901.022 50.4U701.011