How to check if the Tag's battery is charged or not

If you have Trackting SMART V3

If you have SMART V3, with Tag as shown here, read here.

photo about the Tag for Trackting SMART V3, white background

If you have Trackting SMART V2

If you have SMART V2, with Tag as shown here, read here.

photo about keyholder Tag of Trackting SMART V2 Antitheft GPS device for cars and motorcycles - frontal view