11.Why doesn't the stereo indicator light up when charging?

The frequency of the radio is 64-108MHz and is highly susceptible to interference. When charging, the switching power adapter also operates near the FM frequency and can interfere with the FM radio signal.

Therefore, if you need to use while charging, please try to use charging devices with less interference such as rechargeable power bank, linear power supply. Or adjust to the radio stations with greater signal strength.