** LunaR is only enhancing the power when the amount of light emitted is more than 10k lux.
1. Make sure the watch is connected to your phone.
"Settings"--"Hot key"--"Find my phone"--"OK", Double Pressing the left button, your phone will vibrate and make a sound.
2. If it's a sunny day, go outside and make sure there is no covering over the watch face. Wait for 2 minutes, "Harvesting status" should be changed from "stand-by" to "Charging".
Or, you could try with a flashlight. Turn it on and put it against the watch dial, it should also be working.