The answer is NO.

Since the battery of Argus PT is non-removable, it's not supported to charge the battery separately.

You can only charge the camera with the battery together.

The Cameras with a Removable Battery

Argus 2, Argus Pro, Reolink Go, Reolink Go Plus

The Cameras with an Embedded Battery

Argus Eco, Argus 2E, Argus 3, Argus 3 2K, Argus 3 Pro, Argus PT, Argus PT 2K, Reolink Go PT Plus