Nintendo has acknowledged an issue with the battery indicator on the Switch 2 that has been reported by some users. This problem is not related to the battery itself but rather how the system calculates the remaining charge. 
As a result, some players are seeing inaccurate battery readings that suggest they’re close to running out of power when, in fact, hours of playtime remain.
To resolve the issue, Nintendo suggests powering off your Switch 2 and then rebooting it into its secret Recovery Mode. To do this, hold down both the volume up (+) and volume down (-) buttons while turning on the device. This may reset the battery gauge, allowing the system to show the correct charge level.
If this doesn’t fix the problem, Nintendo provides an alternative solution: fully charge your Switch 2 to 100%, let the battery drain to nearly empty, and then recharge it again to full. Nintendo recommends repeating this process a few times to gradually improve the battery indicator’s accuracy.
If neither of these solutions works, Nintendo advises that your Switch 2 may require servicing. Although it’s not ideal, these steps should help those experiencing the issue without needing to send in their device for repair.
For those curious about more hidden features, the Switch 2 has a few surprises, including GameCube startup animations and a method to turn your smartphone into a makeshift Switch 2 camera for a fraction of the price of the official accessory.