Overview
- iFixit released a factory tour video showing Lead Teardown Tech Shahram Mokhtari assembling one of the outlet’s replacement iPhone batteries from programmed circuit board to installed unit.
- The clip documents programming of blank Battery Management System (BMS) boards, spot‑welding those boards to cells, folding and insulating the board with Kapton tape, and attaching adhesive pull strips before installation.
- Technicians run multiple quality checks on every finished battery, including impedance, capacity, and overcurrent protection tests, and they connect diagnostic tools to confirm the BMS reports temperature, cycle counts, and health accurately.
- The factory shown says it produces nearly 13 million lithium‑polymer cells a month, a scale figure presented in the video that is reported but not independently verified by the coverage.
- By pulling back the curtain on BMS programming and testing, the video clarifies how safety electronics shape aftermarket battery function and gives consumers and repairers a clearer basis to judge replacement part quality.