Lenovo Laptop Battery Pinout Diagram Best Jun 2026

Never connect voltage to the SMBus pins. They operate at 3.3V logic. 12V will instantly fry the BMS controller.

Part of the communication interface that synchronizes data transfer between the battery and the laptop. Lenovo Laptop Battery Pinout Diagram

These are the smaller pins in the center. Typically, Clock (C) and Data (D) are located next to each other. You can often identify them by measuring resistance to the Ground pin; they usually pass through protection diodes. Never connect voltage to the SMBus pins