iPhone · Engadget
It's still generally fine because a USB-PD charger connected to a non-USB-PD phone will simply default to a safe output
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The answer to this question depends on your phone's fast-charging capabilities.
Key facts
- USB Power Delivery (USB-PD) is a charging standard developed by the USB Implementers Forum (USB-IF) that governs how power flows between a charger and a device
- It's still generally fine because a USB-PD charger connected to a non-USB-PD phone will simply default to a safe output
- As a rule of thumb, before you use any charger, check it for safety certification markings such as Underwriters Laboratories (UL), Intertek (ETL) or the CE mark
- All recent iPhones, Pixel phones, Galaxy devices, MacBooks and most Windows laptops these days support USB-PD
Summary
It's a common occurrence: You have your fully charged laptop plugged in before you, but your smartphone is seriously lagging behind. That's the big question that they've all asked ourselves, especially as USB-C is now common across phones, tablets and laptops. Something you should know is that a USB-C laptop charger does not simply force maximum wattage into a phone. That said, because using a high-power charger is considered to be generally safe doesn't mean there aren't situations that come with a risk. USB Power Delivery (USB-PD) is a charging standard developed by the USB Implementers Forum (USB-IF) that governs how power flows between a charger and a device. When you plug in a device, there's a back-and-forth happening.