How can I tell when my smartwatch is charging? A lightning bolt will be visible on the watch screen. You can also swipe down to see a lightning bolt next to your battery percentage. Additionally, a circle indicator will appear on the screen show the percentage of charge. Related articles How long does it take to charge my battery? I've placed the smartwatch onto the charger. Why do I not see the charging indicator on the display? How do I charge my eco-drive watch? Why did my watch stop working and only show the time? How do I set my watch?