Press the small black pin on the inside of the lid. This will activate the LED lamp on the outside of the lid. If the lamp lights up red or orange, the battery must now be charged to prepare further blends. When the light is green, the battery is already charged and ready to blend!
Another possibility to check the charge status of the Vejo is offered by the Vejo App, if the Blender has already been linked via Bluetooth. Open the Vejo App, log in, navigate to My Vejos in the left menu bar and click on your connected Vejo to display the exact battery status.