Topic: I do not understand this device

I have played with joycons and it showed low battery notification.
Then I put the console on sleep while docked and attached the two joycons and waited 2 hours.

Picked the joycons again to continue playing but the battery status is still low.
I do not understand this console, and I have it for 6 years!

Sometimes it charges the joycons, sometimes not.
Why is it so confusing? Why there is a sleep option if not to download games and charge the joycons while in sleep mode? If it does not function as I understand, then why do we need sleep mode, leave only turn off option so it wont be so confusing!

@Mogruk
Was the dock connected to a charger?

Maybe the rails have debris in them or the contacts are dirty, so the switch has a hard time physically connecting to your controllers.

Yes of course, I play always docked (at least for the past 1 month)
The battery, when everything works, lasts for about a week (My current game is 40+ hours and I had to charge maybe 3 times)

@Eel
Its a new OLED device (when I mentioned 6 years of use, I actually have 3 Switches - V1, V2 and OLED)
Most of the time when I had Pro controller the Joycones was always connected to Switch so its very clean and no dust there. (Now I do not have the Pro controller)

I don’t have that issue lol I just have the switch lite.

When you dock Switch, it only charges the SYSTEM not the joycon, until the system is fully charged. Only then will it switch to charging the joycon.

2 hrs is barely enough time to charge the system. So of course the joycon didn't charge. You need to give it a couple hours to charge the system, then a few more for the joycon. Alternative is charge joycon separately with a chargeable grip plugged in or a joycon charge dock. Or have a separate pair you keep on a joycon charge dock for TV play.

@JaxonH If you play docked, the system shouldn’t die though… I think that’s how it works, at least.

In my experience, my joy cons usually don’t charge unless I leave them overnight, I don’t really understand why, I’ve just come to except it

You can play the Switch on the go if the JoyCon not charged. You can't play it with the console uncharged. The console charges first

And if you're playing docked the console charges while you're playing. So the JoyCon go onto the already charged console once you've finished and immediately charge