The BTI battery is compatible with the Toshiba Dynabook Satellite Pro C40-G / C40-H / C40-J / C50-E / C50-G / C50-H / C50-J, Medion Akoya E15403. OEM P/N: 40071698, 4588106-2S, 40072215, 4588105-2S, 4588106. We recommend: Advance exchange for this product is available directly through Origin Storage throughout the 18-month warranty period. Please note: Please get in touch with us if you have any questions.