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lqcc 温度决定速度，实际差距远比纸面参数小，甚至倒挂。我用了这么久对充电速度没有任何不满，相比之下，其它充电器充电导致的手机发烫更令人不悦，PD 的设计相比 Apple 更优雅、实用，可以单手取放
7.5W CHARGING VS. 15W CHARGING: IT DON'T MATTER THAT MUCH.
「 When buying wireless chargers there's a lot of misplaced emphasis on the charger's wattage rating. It's an easy stat to be misled by: 15W is almost twice as powerful as 7.5W, so it must be twice as fast, right? Nope, not even close. And we're not just saying that, we've tested the snot out of it.
Some phone manufacturers have proprietary charging protocols (Apple 15W, Samsung 15W) that are not obtainable by 3rd party manufacturers. This means when you put an Apple phone on, say, a PD Wireless Charging Stand, the max charging wattage you'll reach is 7.5W and not 15W. That sounds like a big difference, but in practice (and over numerous lab tests) the relative charging performance is quite similar. In practice, the difference between charging speed with an Apple charger and a Peak Design charger are imperceptible.
The main reason for this is that most phones cannot sustain these high charge powers for more than a short period of time before they heat up and need to reduce charge power for the long remainder of the total charging time. In other words, just because a charger is 15W doesn't mean it always charges your phone at 15W. Most of the time, it will charge your phone at a much lower wattage.
In practice, the time it takes to fully charge your phone depends on a huge range of factors. Your phone model, battery age, power source, case-charger alignment, and—most importantly,—ambient temperature all affect charging speed. Wireless charging is not as fast as corded charging no matter what charger or phone model you may have. If you want the best performance possible you should try and keep your charger as cool as possible. 」
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https://support.peakdesign.com/hc/en-us/articles/5351084746260