Reddit mentions of AUKEY USB C Power Bank, 20000mAh Portable Charger USB C, Slimline Type C Battery Pack with 3 Input & 4 Output Compatible with iPhone 11/ 11 Pro/XS Max/8, Nintendo Switch, Samsung Galaxy Note8, Pixel

For those commenting on the power bank... OP is using a USB-A power bank and so it won't charge the Switch while it is also being played. It will extend play time significantly, and it'll charge the Switch while idle.

USB-C (5V/3A) will charge the Switch while being played and it'll charge the Switch much faster than the USB-A while idle. USB-C PD will charge the Switch safely at the maximum rate, but those power banks are probably too big for this setup.

Aukey does make a 10,000mA USB-C power bank which is the same size as OP's. It is not USB-C PD, but again it is more than sufficient to charge the Switch during play. They also make a 20,000mAh USB-C power bank, as OP mentions, which is 50mm longer, 20mm wider, and the same thickness.

this is what you’re looking for
AUKEY USB C Power Bank, 20000mAh Portable Charger USB C, Slimline Type C Battery Pack with 3 Input & 4 Output Compatible with iPhone Xs/XS Max/ 8/ Plus, Nintendo Switch, Samsung Galaxy Note8, Pixel https://www.amazon.com/dp/B0759TDR3H/ref=cm_sw_r_cp_api_i_IJpCDb5DX21AC

I was thinking of this, but it does have more than one port. https://www.amazon.com/AUKEY-20000mAh-External-Compatible-Nintendo/dp/B0759TDR3H

The switch definitely has the possibility for many accessories. I'll link all the stuff I've bought at the end because I would recommend all of them

There is built in storage but not enough. I will recommend any micro SD card that's either 64 or 128 gb depending on how many games you plan on downloading. If you're going mostly mobile eshop games would definitely be more convenient.

As for other items, I love my pro controller but its not a necessity. I also only use it at home so it might not be for you.

You need a case for it, no two ways about it. The good news is that they are pretty cheap. There's cases that just carry the console, that carry the console and some extras, and that carry pretty much everything you could want to carry. Unless you're taking the dock often, I would just suggest a case with some extra storage.

I'd suggest a battery bank. There are a million options out there, and most of it has to do with cost. Just buy a size you like from a trusted brand like anker, ravpower, or aukey.

You also need a screen protector, because the plastic screen is not exactly durable. Anything works, but I would recommend tempered glass.

Case

Micro SD

Pro Controller

Battery Bank

Screen Protector

I use AUKEY power bank and it is amazing. I can charge my Switch while playing several times. And bonus use it for other things like my phone. Well worth it. Have taken it on flights several times too and saved me when playing high battery usage games.

cell phone sized and much bigger but still as slim as a pack of cards sized

edit: more importantly ( and the reason I bought them) they both have USB-C input for charging alongside the regular micro usb charging port.

https://www.amazon.com/gp/product/B0759TDR3H

\^I happen to have this power bank.

"Safety Features: Built-in safeguards protect your devices against excessive current, overheating, and overcharging"

personally, I prefer chargers that charge themselves on USB c. Just bought this guy.
https://www.amazon.com/gp/product/B0759TDR3H

I take my switch on the train every school day. and need a traveling case that fits the switch + joycon, hori playstand, usb-c cable, pro controller, and this powerbank by aukey.

Do you guys have any recommendations?

Cool, so when comparing a product like:

Solar Charger RAVPower 15000mAh Outdoor Portable Charger Solar Power Bank Dual USB External Battery Pack Power Pack with Flashlight (IPX4 Splashproof, Dustproof, Solar Panel Charging, DC5V/2A Input) https://www.amazon.com/dp/B073P5D9KD/ref=cm_sw_r_cp_api_wFTVAb4E9X531

With no usb c output- max is 2.1a out at 5V

And this one:
AUKEY 20000mAh External Charger, USB-C Power Bank with 3 Input & 4 Output Battery Pack for Nintendo Switch, iPhone X / 8 / Plus, Samsung Galaxy Note8 https://www.amazon.com/dp/B0759TDR3H/ref=cm_sw_r_cp_api_cWTVAb0GJBNN7

With usb c Says max output is 3a at 5V

Is that a noticeable difference in charging speed?

Thanks

What about this puppy: https://www.amazon.com/AUKEY-20000mAh-External-Charger-Nintendo/dp/B0759TDR3H/ref=sr_1_4_acs_ac_2?s=wireless&ie=UTF8&qid=1537908743&sr=1-4-acs&keywords=usb+c+battery+pack

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Turn off background app refresh for everything but what you need, if you are doing heavy stuff like gaming get more chargers for different locations in your house where you might setup or buy a USB-C portable battery pack.

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Cable

https://www.amazon.com/gp/product/B07JJM87FG/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

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Power pack

https://www.amazon.com/gp/product/B0759TDR3H/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

​

Charger

https://www.amazon.com/Anker-Delivery-Charger-PowerPort-Matebook/dp/B07BQJWDRM/ref=sr_1_8?keywords=USB-c+charger&qid=1549925108&s=gateway&sr=8-8

One of the best options out there is only $50 right now. 26800 mAh capacity and a great brand.

But keeping it at $40 or less, There is an option with USB-C out, which is almost as good, despite the cut in capacity.

When looking at capacity, use the Switch as your guide; it has a 4310 mAh internal battery. So the biggest difference between these two options is roughly one whole charge of the Switch.

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Any benefit in getting the anker 20100 over the Aukey 20000? I also see this aukey 20000 with more ports and slightly less wattage https://www.amazon.com/dp/B0759TDR3H/ref=cm_sw_r_cp_api_EVH9BbZEJM9Y0. Do you know how it compares?

AUKEY 20000mAh External Charger,... https://www.amazon.com/dp/B0759TDR3H?ref=yo_pop_ma_swf

AUKEY 20000mAh External Charger https://www.amazon.com/dp/B0759TDR3H