![]() ![]() But that spec also defines a variety of power output levels, so even among USB-PD chargers, they’re not all the same. I have a Nekteck 65W USB-C wall charger that works well with my 7480 and other laptops that charge over USB-C. But either way, if you look at the AC adapter included with the 7480, it delivers 65W. The other possible issue is that the USB-C charger must support the USB Power Delivery spec to be usable, and most phone chargers don’t, even some USB-C phone chargers. Although if that’s a multi-port charger, it probably can’t supply all 4A out of a single port, fyi. Most phone chargers are 5V 1-2A, or 5-10W, although some Qualcomm Quick Charge 3.0 devices go higher by increasing voltage to 9V. That’s actually quite a lot for a phone charger. So, your charger offers 5V 4A, which is 20W. And even before attempting the operation mode I described, laptops will first throttle their performance as much as possible to avoid drawing on the battery while plugged in, so using an undersized charger isn’t a good experience. Some laptops will do that in situations of extreme load and/or seriously undersized chargers, but even there, below a certain level the laptop doesn’t even bother trying to work with the charger. And chargers don’t just handle charging the battery they’re meant to also provide enough power to run the laptop itself, on top of charging the battery, meaning you can’t connect a low-capacity charger and have the laptop draw whatever it can to charge the battery whenever it can and continue drawing on the battery for the power it needs to run. Sorry if I’m stating the obvious here, but laptops require more power to run than phones. ![]()
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