The Acer BTP-63D1 replacement laptop battery by Amstron is made from the highest quality cells and parts. The LAC-36 is designed to replace OEM part numbers: 60.49Y02.001, 91.49Y28.001, BT.00803.007, BT.00805.002 and BTP-63D1. This replacement Acer laptop battery has been rigorously tested to ensure that it is 100% compatible with the Acer Aspire 3020, 3610, TravelMate C300 and other series of Acer notebooks. Take your work on the road with you without sacrificing performance and productivity with Amstron brand Acer laptop batteries. • Chemistry: Li-Ion • Rating: 14.8V 4400mAh • Rectangular battery with seven slit-type contacts on corner • Will meet or exceed original specifications • Warranty: 1 Year