A1331 13″ A1342 (Late 2009 Mid 2010) Battery for Apple MacBook Unibody

This battery is designed for Apple MacBook Pro 13-inch Unibody (A1342, Late 2009 – Mid 2010) models. It is a built-in lithium-polymer battery used in older MacBook Pro systems, providing stable and efficient power for office work, browsing, media playback, and general productivity. The most common part number is A1331, also compatible with Apple identifiers such as 661-5391, 661-5585, 020-6580-A, 020-6809-A, and 020-6810-A depending on production batch and model configuration