A new video from iFixit reveals the detailed assembly of an iPhone battery, demystifying a process often hidden from consumers. Shot inside a large factory in China, the footage takes viewers through post-manufacturing stages, from programming the Battery Management System (BMS) to attaching it to the cell and running quality control tests.

This behind-the-scenes look highlights the numerous manual steps involved in transforming a raw battery cell into a functional component for Apple devices. The video follows iFixit’s Shahram Mokhtari as he constructs one of their replacement batteries, emphasizing the careful handling and testing required before it’s installed in an iPhone.

The comprehensive demonstration covers attaching the BMS board, folding and securing it, applying adhesive strips, and finally, testing the battery’s functionality by powering up an iPhone. This insight offers a clearer understanding of the labor and precision behind a seemingly simple electronic part.

This peek into battery production underscores the complexity often overlooked in everyday consumer electronics. iFixit’s commitment to transparency extends beyond repair guides, offering educational content on the manufacturing journey of essential components.