Don't worry, it doesn't matter, the Apple 13 can be charged fast and slow
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The 1iphone 13 series uses a fast charge, and the full time is about 1 and a half hours. The previous 5w slow charge, basically takes 3 hours to fill. That's a pretty big speed gap. There is also a difference in the damage to the battery between fast and slow charging, and the health of the fast charging battery is quickly lost. This is also a big reason why Apple has been limiting the charging power. The battery is worn out too fast, or even damaged. Slow charging is better.