![]() ![]() ![]() USB-IF certification: Although we didn’t require it, certification by the USB Implementers Forum (USB-IF) helps bolster the credentials of a charger, signaling that it’s well made and safe, and that the company behind it has invested in its own reputation.Power-to-dollar value: We considered the price of the charger relative to the total power it can deliver across its ports, ruling out models that were more expensive but didn’t offer a higher power output or extra features.We considered only chargers capable of this maximum output level. USB-A charging maxes out at 12 W (5 volts, 2.4 amps) for Apple devices and many Android phones, while some of the latter can charge faster with Qualcomm’s QuickCharge 3.0 standard. USB-A ports with 12 W or QuickCharge 3.0 output (if applicable): Many USB-C chargers also include a USB-A port for legacy devices.For our most recent update, we tested five 30 W chargers to find a smaller alternative that can still charge the MacBook Air and some Chromebooks at their highest speeds. We also tested 60 W and 87-to-100 W chargers, which are capable of charging more powerful computers faster. Anything lower than that will still charge these devices, but won’t do so at the maximum rate. USB-C ports with 30 W or higher output: Since many laptops charge at 45 W or higher, that’s the minimum we initially considered for the chargers we tested. ![]()
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