What the Nintendo Switch is and how it connects

The Nintendo Switch is a tablet-sized device with detachable controllers on the sides. It works by connecting to a dock that plugs into your TV, so you can play games on your television screen. When you undock it, the same device becomes a portable handheld console — the screen stays the same size, but you're holding the whole thing in your hands instead of looking at a TV.

The controllers, called Joy-Cons, slide off the sides of the device and can be used separately or held together as a single controller. This design is what makes the Switch different from other gaming consoles: one piece of hardware that switches between three modes — docked to a TV, held as a tablet with a kickstand, or handheld with the controllers attached.

Inside, the Switch runs on a processor made by NVIDIA. This chip handles all the calculations needed to run games, display graphics, and manage the system software. The device has 32 gigabytes of built-in storage, though most people add a microSD card to store more games, since many modern Switch games take up significant space.

Key Takeaways

  • The Switch connects to your TV through a dock, but also works as a standalone handheld device without any cables or external equipment.
  • The Joy-Con controllers detach from the sides and can be used together, separately, or with a grip accessory that holds them like a traditional controller.
  • Games are stored on the device's internal storage or on a microSD card you insert into a slot on the back.
  • The Switch connects to the internet through WiFi or a USB adapter for online play, and uses a rechargeable battery that lasts between 4.5 and 9 hours depending on the model.
  • You create a user account on the Switch to save your game progress, and that progress stays tied to your account even if you use a different Switch console.

How the dock and TV connection work

The dock is a small stand that holds the Switch upright and connects to your TV using an HDMI cable. When you slide the Switch into the dock, it automatically detects that it's connected to a larger screen and sends the game image to your TV instead of displaying it on the device's built-in screen. The dock also charges the Switch while it's docked, so you can play for hours without the battery draining.

The HDMI cable carries the video signal from the Switch to your TV. You plug the HDMI cable into the back of the dock, then into an HDMI port on your television. The dock also has a USB-C port where you plug in the power adapter — this is what actually charges the device. If your TV has an HDMI port, the Switch will work with it; there's no special setup required beyond plugging in the cables.

When you remove the Switch from the dock, it immediately stops sending the signal to your TV and switches to displaying the game on its own 6.3-inch screen. This happens instantly — you don't have to restart the game or do anything else. The Joy-Cons stay connected wirelessly, so you can keep playing without interruption.

How the Joy-Con controllers communicate with the device

The Joy-Cons use Bluetooth wireless technology to connect to the Switch. When you first set up your Switch, you pair the Joy-Cons by holding a button on each one, and after that they automatically connect whenever you turn on the device. The Bluetooth connection has a range of about 30 feet, so you can sit on your couch and play without holding the device itself.

Each Joy-Con has its own battery, separate from the Switch's main battery. When the Joy-Cons are attached to the sides of the Switch, they charge automatically through the connection. When you detach them, they continue to work wirelessly until their battery runs low — typically after 20 hours of play. You can charge them by sliding them back onto the Switch, or by using a separate Joy-Con charging dock if you have one.

The Joy-Cons contain motion sensors and vibration motors. The motion sensors detect when you tilt, shake, or rotate the controllers, which some games use for gameplay — for example, steering a car by tilting the controller. The vibration motors create haptic feedback, which means the controller vibrates to simulate impacts or textures in the game. These features are built into the hardware itself, not added by software.

How games are stored and played

Games on the Switch come in two forms: physical cartridges that you insert into a slot on the top of the device, or digital files that you download from the Nintendo eShop and store on the device's internal storage or a microSD card. Physical cartridges are small, about the size of a postage stamp, and each one contains the entire game. When you insert a cartridge, the Switch reads it and starts the game.

Digital games are downloaded to your Switch's storage. The device comes with 32 gigabytes of built-in storage, but after the system software takes up space, you have roughly 25 gigabytes available for games. Since many games are 5 to 15 gigabytes each, most people add a microSD card — you can buy these separately and insert one into the slot on the back of the device. A microSD card can hold dozens of games depending on their size.

When you start a game, the Switch loads it into its RAM (random access memory) and begins running it. Your progress is saved either to the device's storage or to the cloud if you have a Nintendo Switch Online subscription. If you delete a digital game to make room for another one, you can download it again later using your account — you don't lose ownership of it.

How the battery and power system work

The Switch has a rechargeable lithium-ion battery built into the device. The original Switch model lasts about 4.5 to 6.5 hours on a full charge, depending on what game you're playing and how bright you set the screen. The Switch OLED model has a larger screen and lasts about 4.5 to 9 hours. The Switch Lite is smaller and lighter, and lasts about 5.5 to 7.5 hours.

You charge the Switch using the USB-C cable and power adapter that come in the box. The cable plugs into the bottom of the device. When the Switch is docked, it charges while you play, so you can use it indefinitely as long as it's connected to power. If you're playing handheld, you can plug in the power adapter and play while charging, or you can play until the battery runs out and charge it afterward.

The battery degrades over time with normal use — after a few years, a full charge won't last as long as it did when the device was new. If the battery becomes too degraded to hold a useful charge, you can send the Switch to Nintendo for a battery replacement, though this costs money and takes time. Some people choose to use the device plugged in most of the time to slow battery degradation.

How online play and internet connection work

The Switch connects to the internet through WiFi. You set up a WiFi connection in the system settings by selecting your network and entering your password, just like you would on a phone or computer. Once connected, the Switch can download games, receive system updates, and connect to online multiplayer games.

To play online multiplayer games, you need a Nintendo Switch Online subscription. This is a paid service that costs money per month or per year. Without it, you can still download games and use most features, but you cannot play online multiplayer or access cloud saves. The subscription also gives you access to a library of classic NES and SNES games.

The Switch can also connect to the internet using a USB adapter that plugs into the dock. This is useful if your WiFi is weak or unstable in the room where your TV is located. The adapter connects to an ethernet port on your router, providing a wired connection that's usually more stable than WiFi.

How user accounts and game saves work

When you first set up your Switch, you create a user account. This account is what the device uses to track your game progress, your downloaded games, and your settings. You can create multiple accounts on a single Switch, so different family members can each have their own progress and settings.

Game saves are stored on the device itself, tied to your account. When you play a game and reach a checkpoint or finish a level, the game automatically saves your progress. This save file stays on your Switch unless you delete it manually. If you use a different Switch console and sign in with your account, you can download your saves to that device and continue playing where you left off — but only if you have a Nintendo Switch Online subscription, which includes cloud save backup.

If your Switch breaks or stops working, your game saves are not lost if you had cloud backup enabled. You can sign into a new Switch with the same account and download your saves. However, if you never had a subscription and didn't back up your saves, they stay on the old device and cannot be recovered.

How system updates and software work

The Switch runs system software that manages the device's basic functions — turning it on and off, connecting to WiFi, displaying menus, and running games. Nintendo releases updates to this software periodically. Updates can add new features, fix bugs, or improve performance. The Switch checks for updates automatically when you connect to the internet, and you can also check manually in the system settings.

Updates download in the background and install when you're not using the device, or you can install them immediately. Most updates take a few minutes to install. You should not turn off the Switch during an update, as this can corrupt the system software and make the device unusable. If an update fails, you may need to contact Nintendo support.

Individual games also receive updates from their developers. These updates fix bugs, add new content, or improve gameplay. When you start a game, the Switch checks if an update is available and prompts you to download it. Like system updates, game updates are important to install because they often fix problems that make games unplayable.

Frequently Asked Questions

Can I play Switch games on my phone or computer?

No. Switch games are designed specifically for the Switch hardware and will not run on other devices. Some games are available on other platforms, but they are separate versions. The Switch's processor and software are different from phones and computers, so the games are not compatible.

What happens if I lose a Joy-Con or it stops working?

You can buy replacement Joy-Cons from Nintendo or third-party manufacturers. They pair with your Switch the same way the original ones did. If a Joy-Con has a hardware problem like a broken button or a connection issue, you can send it to Nintendo for repair, though this costs money. Until you replace it, you can still play games that don't require that controller.

Do I need WiFi to play Switch games?

No. Most Switch games work completely offline without any internet connection. You only need WiFi to download games from the eShop, receive system updates, play online multiplayer, or back up your saves to the cloud. Single-player games work fine without internet.

Can I use the Switch without the dock?

Yes. The dock is only needed if you want to play on your TV. You can play handheld with the Joy-Cons attached, or use the kickstand to prop up the device on a table. The dock is optional, though it's convenient for charging and TV play.

How do I know if a game will work on my Switch?

Check the game's box or the Nintendo eShop listing. It will say which Switch models it works on — original Switch, Switch OLED, or Switch Lite. Most games work on all models, but some are exclusive to certain versions. The eShop will not let you download a game that's incompatible with your device.