How Fast Apple iPhone 15 Is Charged? - ChargerLAB Compatibility 100

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Introduction
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Apple has finally replaced the Lightning port on the iPhone 15 series with USB-C port. It brings a few questions. Is there any charging improvements? Can we continue to use our old chargers and power banks to charge it?
Today, we will use 100 charging devices, like chargers, power banks, power stations to see how fast it can be charged and if it can pass the ChargerLAB Compatibility 100 test.