Amstron Lithium Ion Extended Laptop Battery For Acer Travelmate 330/340 (also works with Acer BTP-25D1) Looking for reliable performance from your Acer BTP-25D1 Laptop? Our Acer BTP-25D1 battery will provide you the performance and dependability that you demand for your Laptop. With an efficient rating of 11.1V Volt and 4400 , you never have to worry about being too far from an ac outlet. Our line of Acer BTP-25D1 batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. With an industry leading warranty and customer service, you can’t go wrong. ... More Info