If you charge a laptop with USB PD, be careful of "wattage" and "cable"!

Speaking of checkpoints for selecting laptops, the OS is Windows or Mac, aside from the installed CPU and memory, the weight of the main body and the number of inches of the display. And recently, "ease of charging" seems to be counted in one of them. What are your PC chargers? The USB Power Delivery, a "PD", is listed as a judgment material for ease of charging. In the past, the charger of the laptop PC used the genuine product attached to the product, but if it is PD compatible, you can use a general-purpose USB-AC adapter. Not only the USB-AC adapter but also the PD-compatible mobile battery can be charged, so the mobility of the laptop is greatly improved. It is also a great advantage that you can share power with smartphones and tablets. However, it is not enough to check whether the target notebook PC is PD. The number of USB-AC adapters and mobile batteries to be purchased is also important. For example, when the battery level of Surface Pro 7 is exhausted, if the charger/mobile battery is more than 60 watts, the Surface will be turned on at the same time, but if it is less than 60 watts, it will be for a while from the connection to the power turn on. It is said that you are waiting (10%of charging is required). It can be said that there are many situations where the output is more useful. However, if you use a charger/mobile battery of 60W or more, you need to pay attention to the cable. The USB-C cable corresponding to PD has a 5A (amper) compatible with 5A (amper), and a 5A-compatible USB Type-C cable (up to 20V/5A) for 5A compatible PD charging is required. 。 Even if a 100W-compatible USB-AC adapter is prepared, if the cable is not 5A compatible, the charging will be reduced to 60W. Use 5A -compatible cables for PD charger with 60W or more.

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