How do I fix my left Joy-con?

Calibrate or recalibrate your Switch Joy-Cons. The first thing you should do if you notice Joy-Con drift (especially on the left Joy-Con) is calibrate your controllers.
Clean your Joy-Con’s joystick.
Nintendo will fix Joy-Con drift for you.
Buy a new Joy-Con for your Switch.
Replace the joystick yourself.

How do I reset my joy-con controller?

With the Joy-Con detached, reset the controller by pressing the SYNC Button once. Then press any other button to power on the Joy-Con again. Ensure that nothing is covering the IR Motion Camera on the Joy-Con (R).

How long do Nintendo switch controllers last before breaking?

The Joy-Con controllers take approximately three and a half hours to fully charge. When fully charged, the battery for the Joy-Con controllers can last approximately 20 hours. This may be shorter depending on the software application and functions being used.

Is there a way to turn off Joycons?

From the HOME Menu, select “System Settings” > “Controllers and Sensors” > “Disconnect Controllers”. Hold down the “X” Button on the right Joy-Con until the blue circle is fully illuminated. The attached Joy-Con controllers can be used with the console. All other controllers will need to be paired again.

How long does it take to charge switch Joycons?

approximately 3 ½ hours

Is it better to turn off Nintendo switch?

How do I turn the Nintendo Switch console off? It’s recommended that you put the console into sleep mode when you stop playing. This will reduce battery consumption and will allow you to quickly resume playing.

Can you turn off Nintendo switch while downloading a game?

Yes, but only if you have a game suspended that could use internet. If you have such a game runnin in the background, putting the console to sleep will shut down the connection and it won’t be re-estabilished to download pending software or updates.

Can the switch overcharge?

It can’t overcharge. That would stop it being a home console. Even when you are using as portable it stops using the battery at 100% and uses the power supply to run the system. A long term high state of charge makes the battery much more vulnerable to swelling (which occurs if the battery is overcharged).