The battery represents roughly half of the price you paid for your NIU. So it should be maintenanced at least as well as the scooter itself.
[UPDATE: In 2018 NIU themselves published this page pretty much covering this FAQ entries content.]
- Optimal charging temperature: 10 to 35°C
- Using-temperature should not exceed -10 to 45°C
- Do not unnecessarily keep on charging the battery when it is fully charged (Green LED lit on charger)
- Do not completely drain the battery – try to charge at 10% at the very least.
(long term) Storing
- Optimal storage temperature: 0 to 20°C
- Recommended charge of 40-75%
- Check charge-level every 2 months (e.g. put it into your NIU to get a proper readout)
- Charge it to 100% when planning to use it again
To make sure you’re not “overloading” your battery you could use this engery-saving mains socket from Ansman (or something similar):
This automatically cuts of power when it falls below a certain (programmable) threshold, e.g. below 50 watts.
Q: There’s an Error 30 displayed in my NIUs dashboard
A: Generally, this is a Battery failure code.
The official manual provides these reasons and how to fix them:
|Battery over-charging||Stop charging. Start discharging if
it is normal.
|Low-temperature battery protection (-20
|Restore the temperature|
|The BMS temperature detection circuit is
|Replace the battery|
N1s owners reported several occasions when this happens:
- Charging the battery externally(!) it only reaches a 90% charge. Putting it back into the NIU triggers Error 30.
- Unplugging the charger right after the LED changed to green.
- After driving downhill, especially when the charge is around 90%
To conclude all these reports, the main reason for Error 30 seems to be the BMS which is built into the battery.
One owner contacted the German/Austrian importer who responded like this:
This error report can easily be deleted by simply starting your scooter by the start-button.
Please mind: If Error 30 occurs, the “P” symbol will not be displayed in the dashboard.
After driving for about 2 meters the BMS will recognize power consumption from the battery and you can use your scooter as normal.
When starting your scooter make sure that the side stand is not swung out!
This procedure did delete the Error 30 in 100% of all cases – maybe an update of the BMS (using the diagnose device) will permanently correct this issue.
We’re currently working on new BMS boards which also might be good for retrofitting.
Generally, Error 30 will be triggered if you drive your NIU downhill for a longer distance and recuperation is ‘overloading’ the battery. One hint in the forums was to use the brakes every now and then and there will be no error displayed.