And an older Apple 61W USB-C power adapter. I found the 9V/2A vs 9V/3A differences testing a Google 18W USB-C charger. Conditions designed to induce max power draw. Legend of Zelda was running in a high usage zone. ![]() The test data below used a Nintendo Switch in handheld mode. ![]() I’m here to share new data that changes our conclusions. I’m not here to disparage previous work done. I saw those reports and they made sense to me, too. After learning the Switch draws up to 18W it made sense to assume a 9V/2A charger (which is 18W) would provide said 18W. Without testing some specific specs I wouldn’t have come across this new information. Much more so than anyone who did initial charge testing with an early Switch. ![]() I’ve had the advantage of testing a larger variety of chargers and power banks with the Nintendo Switch. Under USB-C specs it should support the full 15W, but it doesn’t. But instead it limits itself to 5V/2A or 10W. So in theory a regular USB-C charger offering 5V/3A or 15W should charge it almost as fast. It does this using Quick Charge 3.0 or Motorola’s own TurboPower tech. For example, the Moto G6 USB-C phone can support up 16W power draw. It can be seen with many USB-C Android phones. This behavior isn’t unique to the Switch. Otherwise it stops drawing at 66% to 80% of the available current. If up to 80% of the current can provide ~18W, then the Switch meets its max draw limit. But under no test case will it draw more than 80% of the current a charger can provide. The numbers vary depending on the voltage. The Nintendo Switch has a current (amps) draw limit, besides its max draw limit. You can skip ahead to the new rating chart here. But I wanted to share what I had learned, and go over the data for anyone interested. This new information won’t be of significant impact to most Switch owners. I used some of those values in my earlier speed ratings. This new data contradicts assumed charging values given shortly after the Switch launched. This was all done based on new testing data I’ve seen and received over the last month. This also required a renaming of several levels to keep the system intuitive. I’ve added a new rating level and adjusted where certain charger specs fall on the chart. Many Switch users report successfully using their USB-C laptop and phone chargers with the console, but given the possible consequences, your best bet is sticking with the OEM and licensed chargers sold by Nintendo.I’ve done a major update to my Nintendo Switch speed ratings for USB-C chargers. Though the original post was lost with the Google+ shutdown, a Reddit post archived an analysis of the Nintendo Switch port conducted in 2017 by a tester known as Nathan K., who said that it is potentially possible to overcharge the Switch console by up to 300% due to its failure to properly negotiate the power output it needs from the charger (via Switch Chargers). ![]() There are also some concerns that because the Nintendo Switch doesn't fully meet the USB-C specification, it may be possible to overcharge it, unlike newer devices that were designed to fully adhere to the PD protocol. This could result in a situation where the power output isn't being managed well and that, in turn, could potentially lead to a battery that degrades faster or possibly even damage the console. Some third-party chargers, particularly ones that are cheaply made, may not have the right charging profiles to properly charge your Nintendo Switch. Put very simply, a charging profile refers to the details the charger uses to optimize charging the device it is plugged into (via Delta Q).
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