While there is no single authoritative technical manual publicly available for the schematic, this specific board version is commonly used as a Battery Management System (BMS) protection module for multi-cell lithium-ion battery packs. Common Technical Characteristics
Lenovo Laptop Motherboard Schematics | PDF | Leisure - Scribd bm5291 ver 13 schematic verified
Based on verified implementations of this specific revision (Ver 13), the board typically includes several core protection and balancing features: BM5291 version 13 While there is no single
A: U1 (LD7535) is not programmable. Any off-the-shelf LD7535 works. However, fakes exist – buy from Mouser, DigiKey, or LCSC. Lenovo Laptop Motherboard Schematics | PDF | Leisure