If you were recently being affected by the issue where the remaining battery charge was not being displayed, a new update is available now that rectifies this issue:
Improvements Included in Version 3.0.1:
(General system stability improvements to enhance the user’s experience, including:)
- Addressed an issue in which the remaining battery charge can’t be displayed accurately.
- If the system’s battery power display suddenly increases or decreases, it will gradually improve by following these steps.
Source: en-americas-support.nintendo.com
