AC Adapter for Charging Sansa Clip w/o Connecting to Computer

Question Regarding charging with AC adapter or Motorola razor charger vs using USB cable and PC -

On my PC when it is connected, the battery indicator shows it is charging by flashing bars across the indicator but when connected. When it is connected  to an AC USB charger or my razor car charger the clip battery inidicator just shows a solid inidicator (partially charged) it doesn’t flash bars across the indicator and doesn’t seem to charge.

I have updated the clip to the .18 latest firmware but the non PC chargers don’t seem to be working. Can anyone else confirm how the battery indicator acts when connected to an AC or DC charger?