Below was written for NB10000. It also applies to Carbo 10000 and Carbo 20000.
Q: The charging never finishes. The first indicator does not light up during charging.
The NB10000 uses three blue indicators to display power levels. It is fully charged when all three blue indicators become solid.
The 4th indicator next to the charging port only turns “white” when the power bank is in the low current charging mode.
Q: How to turn on/off the power bank (the blue indicators)?
The NB10000 features automatic power-on functionality upon connecting a charging cable or tapping the button and automatic power-off when in standby mode. The blue indicators will automatically turn on/off accordingly.
You can also double-tap the mode button to turn off the power bank.
Q: The power bank stops working. Only one blue indicator blinks whenever I tap the button, and it's just been fully charged.
This happens when a buyer attempts to shut off the blue indicators by holding the button for a long time.
The NB10000 enters a hidden hibernate mode after its mode button is held down for a prolonged time (10-15+ seconds). In hibernate mode, the power bank will report a low battery level and refuses to output charges.
How to fix it?
Charge the power bank again for 10+ minutes; it will wake up and work properly.
We must also remind buyers to double-click to turn off the unit. Avoid holding down the button for a prolonged time.
Troubleshooting instruction
To reset the power bank when at least one blue indicator is blinking and the power bank is not functioning properly or losing charge quickly, please follow the steps below:
1. Tap the mode button to turn on the blue indicators.
2. Press and hold down the mode button until the white indicator turns on.
3. Press and hold down the mode button again. The white indicator will turn off first. Continue holding the button for 10-15 seconds or until the blue indicator starts blinking. This will reset the power bank.
4. Plug in the charging cable and charge the power bank for 4-5 hours or until all the blue indicators turn solid.
5. After charging, test the power bank again to ensure it functions properly.
Additionally, please remember the following instructions:
To turn off the blue indicators, double-click the mode button instead of holding it down for a prolonged period. The latter will reset the power bank and requires a full charge again.