Hello, I'm new to electric scooter repair. I have a scooter from the brand CENTURFIT, and I'm having a problem with the controller NJ-AOXIONG AX-HB02. It shows that the battery is completely discharged, but when I check the battery with a multimeter, it reads 40 volts—both the one that powers the controller and the one you charge. Do you know what the problem might be?
Scooter Controller AX-HB02 Not Detecting Battery Charge
- Thread starter JaviRG
- Start date
Where on the system does it show your charge level?
The charge level is displayed on the battery icon in the middle of the screen. However, as you can see in the photo, it appears as if the battery is empty — even though the system shows a voltage of 40.2V just below it.
This suggests that the display is likely calibrated for a 36V system, and is not correctly interpreting the voltage from my battery (which may be 48V or higher).
Because of this mismatch, it always shows the battery as empty even when it has charge. I'm wondering if there’s a way to reconfigure the voltage settings on the display to match a 36V system so that it shows the correct battery level.
If that's not possible, would I need to replace the controller and the display with compatible components to fix this issue?
If you can find a programming manual for this display unit, it might be possible. If you can't find the documentation, very unlikely.
Considering you can see raw voltage level, another option is to simply ignore it if the vehicle works fine. The battery level indicators are just a guideline at best, and using raw voltage is often the best option for SoC monitoring.
There are a lot of variants of that ZQ-100 display, but a lot share the same menu. Try pressing the power and mode button at the same time to access the menu, aet P03 to 36v.
I placed this note in my newb faq, on the display, since there are so many variants and some end up on ebikes:
"** Several variations of the ZQ-100 display/throttle exist, and are not interchangeable. Some are 5 wire and some are 6 wire. Some of the similar models include, the LH-100, QS-S4, JH-01, NJAX-T, in both 5 and 6 wire versions. The majority of these display throttles combinations are used in electric scooter applications, and less frequently for ebikes. Note the throttle signal output may be the traditional analog voltage or in many cases a digital signal that only a compatible controller can utilize."
Last edited:
docw009
10 MW
You haven't convinced me whether the scooter has a 48V battery that is considered discharged at 40V, or if it is a 36V battery with a good charge at 40V.
Similar threads
