Joy-con draining main battery?

Bigdrago · 2026-09-26T09:09:26+0100

Hi!
I noticed that on two of my switch oled the main battery is draining even if they are turned completely off. But this dont occur on my newest switch.

I charged all three to 100% and removed joy-cons. After 5 days I turned them on and all were 100%. I inserted joy-cons and noticed 4 of them started charging.

I thought joy-cons didnt charge from main battery when it was powered off.

Anyone else noticed this? All three have picofly and atmosphere 22.5. Guess I have to replace joy-cons batteries to solve this

thesjaakspoiler · 2026-09-26T13:28:00+0100

According to Nintendo joycons don't charge if you completely power down the Switch.

Note that lithium batteries naturally slightly drain themselves.
This can get worse with older batteries.
And there is a very small part of the Switch listening whether the power button is pressed.

Most devices with a battery briefly also start charging once they get power.
When they see that they are already fully charged, then they stop again.

If you;re not loosing a few percent overnight, then it isn't much to worry about.

Joy-con draining main battery?

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