The Nintendo Switch console can be left in the dock while not in use to ensure that it is fully charged.
Leaving the console on the dock or plugged in directly with the AC adapter overnight, or past the point where the battery is fully charged will not cause harm to the battery.
Is it bad to leave your switch in sleep mode?
And yes it’s safe, it was designed to work that way. On the contrary. Turning it on and off continuously will wear your battery faster. It will not damage your system, unless if you are sleeping by using Switch as pillow.
Can the Nintendo 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.
Should I let my switch battery die?
There is NO “memory effect” or other reason to intentionally drop the battery down to 0% before charging. It’ll be tempting to just stretch the battery down to 10% or even 0%, and then put the Switch down without charging. That’s not good for your battery. You should plug it in ASAP after taking the battery down.
Why does my switch battery drain so fast?
The Switch’s battery indicator has been faulty for some since launch. Some users’ battery will appear to drop to 1% rapidly, even though the battery itself works just fine. The short version is that you have to charge the battery to 100% and then run it all the way down two to six times.