LION BATT TM4500 TM4000 AS1680 TM2303 Since its inception, Acer has evolved from a manufacturing powerhouse to a globally recognized computer brand, marketing world-class IT products and services. Acer's complete range of IT products is designed to enhance work efficiency and quality of life, while granting an easy, hassle-free user experience. This Battery pack is designed for Acer TravelMate 4000 series.