Constant red LED light when charging, what to do? (Deeper 3.0 / PRO / PRO+ / CHIRP+)
If the Deeper started emitting the constant red LED light when it's connected (or not) to the charger, it most likely means that the Deeper has some hardware issues and needs servicing.
However, in some very rare situations, it might be caused due to:
1. Using improper charging cables
Therefore, in order to reproduce this, please try using the different (other) chargers including the wall-charger of your smartphone/tablet and see if the device starts charging, thus, emitting any color of LE...