Need a battery for Acer Laptops/Notebooks with the following model numbers: 5120, 5210, 5220, 5420, 5430, 5610, 5620, 7120, 7420? BTI has you covered with our premium 6 cell LiIon battery. This product has been engineered to meet or exceed the original manufacturer's specifications and replaces the original Acer part numbers TM00751, CGR-B/6L5, BT.00605.022, LC.BTP00.005, GRAPE32. All BTI batteries are manufactured and tested under our stringent quality standards and come with an industry leading 18 month manufacturer's warranty. BTI.. True to the Original.