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I think you don’t read the comment. If the battery do not have enough power the level would be 0%. The time from 100%(plugged in) to 0% will depend on how degraded is the battery. It is not difficult to understand. You are repeating Apple excuses. Mobile phones had been dealing with degrading batteries for a long time.

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That’s not how batteries work. Degration over time causes a battery to not just store less total capacity on a “full” charge, but also to output less current at the required voltage. The latter is what is preventing the phone from operating under a full load at peak performance without a hard shut off.

The issue is the device shutting off while there is still charge on the battery, not the battery reaching 0% faster.

To be clear: 0% would be when current voltage or current mAh level is bellow what the phone needs to operate at maximum capacity.

“Voltage and mAh are two different, but interrelated, things. voltage is a measure of the electrical power a battery can deliver, while mAH (milli-Amp hours) is a measure of how long the battery will maintain usable voltage at a given output current.” https://www.quora.com/How-much-mAh-will-equal-to-1-v

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