When we opened the bottom of the MacBook Air's chassis, we saw a black object occupying nearly two-thirds of the surface. It was a Li polymer secondary battery.

The squad attempted to remove this battery ahead of the substrate. But the screws on it were so tight that we had trouble unscrewing them.

On the flexible substrate that emerged from under the battery, Mr. Imai found another brand name next to "Apple." Hearing the name, all the squad members gasped. We made so much noise that our voices were distorted through the microphone. From that name, we could conjecture...

In the next story, we will finally enter the phase from which the laptop won't recover just by tightening the screws again.

movie Air Teardown: Part 2 (2:17, Japanese)
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