This is the most critical section for accuracy. The BM5291 connects directly to the positive and negative terminals of each of the 5 cells.
is a known repository for various motherboard schematics and boardview files. Technical groups like the Laptopbios Facebook Group often have members who share specific files like the BM5291 Ver 1.3 component identification on this board for a repair? Laptop Repair Secrets - Facebook 28 Jan 2021 — bm5291 ver 1.3 schematic
BM5291 Ver 1.3 is a motherboard revision primarily found in Lenovo Inspiron 15 (3511) This is the most critical section for accuracy