About the BTI AC Adapter
BTI 4X20E75111-BTI 20V 230W AC ADAPTER COMPATIBLE WITH 4X20E75111, ADL230SLC3A, ADL230SCC2A, ADL230SDC3A, 02DL144, 02DL143, 02DL142, THINKPAD P50, P50s, P51, P51s, P70, P71, P72, P73, P50, P51, P53, P40, Y910, E440, E450, E455, E460, E465, E470, E475BTI 4X20E75111-BTI 20V 230W AC ADAPTER COMPATIBLE WITH 4X20E75111, ADL230SLC3A, ADL230SCC2A, ADL230SDC3A, 02DL144, 02DL143, 02DL142, THINKPAD P50, P50s, P51, P51s, P70, P71, P72, P73, P50, P51, P53, P40, Y910, E440, E450, E455, E460, E465, E470, E475