NAO can be used while it is plugged in with the adapter. But the battery will charge only if NAO is powered off and plugged to its adapter.
For the related ALMemory keys, see: Battery Sensors .
The following table describes the battery specifications.
|Nominal voltage / capacity||21.6V / 2.9Ah|
|Max charge voltage||25.2V|
|Recommended charge current||1.8 ~ 2.1A|
|Max charge / discharge current||2.1A / 2.0A|
|Charging duration||90 min|