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 I've placed the smartwatch onto the charger. Why do I not see the charging indicator on the display? How long does it take to charge my battery? How do I charge my eco-drive watch? What is the warranty on my Smartwatch? How do I power on my Smartwatch?