According to the USB Implements Forum certified power brick list, Anker has USB-IF certified chargers. This includes wall chargers, a car charger, and the only certified USB-C power bank among the top brands.
The AUKEY PB-Y13 10000 USB-C is the smallest USB-C PD power bank on the market. It will give the Nintendo Switch the same extra playtime and better performance as sized models. But its output isn't quite as good as other USB-C PD.
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The RAVPower XTREME 26800 PD is one of the largest power banks allowed on U.S. flights and capable of fast charging the Nintendo Switch. While it may not fit well in your Switch carrying case it'll provide half a day of extra playtime without any compromises.
The EC Technology 22400 is a large, low cost USB-A power bank. It works well charging the Nintendo Switch while asleep. But its performance is limited during play. It is good for Switch owners who want high capacity at a low cost where time isn't a concern.
I have updated my Nintendo Switch charger safety rating system to use new labels for the ratings. The change is to improve understanding at a glance. The scale and metrics used are the same.
The Apple 12W USB Power Adapter is one of the fastest charging USB-A chargers for the Nintendo Switch. It'll charge a Switch like regular USB-C, but in a smaller package. A great option for commuters and travelers who count every ounce in their bag.
The Apple 61W USB-C Power Adapter from 13-inch MacBook Pros will charge the Nintendo Switch safely in handheld mode. But it won't power the Nintendo Switch dock, despite its high output.
The Inateck 60W PD USB-C Wall Charger is a good choice for Nintendo Switch owners with a USB-C laptop. It supports up to 15-inch laptops without putting out more amps than the Switch can safely take. And it supports fast charging for smartphones.
The Anker PowerCore 13400 Nintendo Switch Edition is one of two licensed by Nintendo power banks. It packs great performance in a small package. Probably the best Switch carrying case power bank available.
The Anker PowerCore 20100 Nintendo Switch Edition is one of two licensed by Nintendo power banks. It compares well with similar sized power banks. But it doesn't offer anything special besides its licensing.
Since the mid-March 2018 release of Nintendo Switch firmware 5.0.0 there has been a lot of questions and postings about Switch bricking. The issue is centered around third party docks, not chargers or power banks. Check out my FAQ on the issue to separate facts from bad information.