About this replacement
Designed for Lenovo devices. Compatible models include ThinkPad T431s. Replacement part numbers include 45N1123, 45N1122, 45N1121, 45N1120, ASM 45N1122, ASM P/N 45N1122, FRU 45N1123, FRU P/N 45N1123. Key specifications: 11.1V, 4250mAh, Li-Polymer.