Measuring battery voltage is one of the most basic and important troubleshooting steps for electric scooters. Whether your scooter won’t turn on, won’t charge properly, or shows abnormal battery behavior, checking the battery voltage can quickly help identify whether the issue comes from the battery, wiring, or charging system.
This guide explains how to safely measure the battery voltage on HALO KNIGHT electric scooters, including where to find the charging and discharge connectors, how to use a multimeter correctly, and what voltage ranges are considered normal for different models.
This tutorial applies to most HALO KNIGHT electric scooters and is suitable for basic diagnosis before contacting technical support.
Safety Tips Before Measuring Battery Voltage
Before starting, please follow these safety recommendations:
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Fully charge the scooter until the charger indicator turns green
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Disconnect the charger from the scooter
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Turn off the scooter
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Perform all steps in a safe, dry environment
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Use a digital multimeter set to DC voltage mode
⚠️ Always avoid touching exposed metal parts with bare hands while measuring.
Step-by-Step: How to Measure Electric Scooter Battery Voltage
Step 1 – Open the Battery Compartment
Carefully open the battery compartment of your electric scooter to access the battery wiring.
Step 2 – Identify the Charging and Discharge Cables
Inside the battery compartment, you will find two different cable connectors:
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Thin wire connector → Charging port
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Thick wire connector → Discharge (power output) port
Step 3 – Measure the Battery Voltage
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Set your multimeter to DC voltage
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Touch the two voltage probes to the metal copper terminals inside the connector
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Measure both:
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Charging port voltage
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Discharge port voltage
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✅ Under normal conditions, the voltage readings from both ports should be the same or very close.
Thin wire connector→ Charging port
Thick wire connector→ Discharge (power output) port
Normal Battery Voltage Range for HALO KNIGHT Scooters
⚠️ A 2–3V difference is considered normal due to measurement tolerance.
| Model | Normal Voltage Range |
|---|---|
| T102 / T104 / T108 | 44.1V – 58.8V |
| T107Pro / T108Pro | 50.4V – 67.2V |
| T107Max | 63V – 84V |
If both the charging port and discharge port show values within the correct range, the battery voltage is considered normal.
What If the Voltage Readings Are Different?
If you notice a significant difference between the charging port voltage and the discharge port voltage, this may indicate:
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Battery connection issues
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Wiring or connector problems
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Battery protection system activation
In this case, please do not continue riding.
📩 Contact HALO KNIGHT After-Sales Support
Email: service@haloknights.com
Please include:
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A short video showing the voltage measurement
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The scooter model
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A brief description of the issue
Our technical team will assist you with further diagnosis.
Video Tutorial: Battery Voltage Measurement
🎥 Recommended Video Guide
To make the process easier, we also provide a step-by-step video tutorial demonstrating the correct voltage measurement method.
👉 Watch the video here:
https://www.youtube.com/watch?v=_5iAIBFevpg
When Should You Check Battery Voltage?
You should measure your electric scooter battery voltage if:
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The scooter does not turn on
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The scooter does not charge properly
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Battery level drops unusually fast
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Error codes: E06 appear on the display
Regular voltage checks help keep your electric scooter safe, reliable, and long-lasting.
HALO KNIGHT designs its electric scooters with professional battery systems and safety-focused configurations. Following proper diagnostic steps ensures stable performance and helps avoid unnecessary damage.
For additional technical guides and electric scooter troubleshooting tips, stay connected with HALO KNIGHT support resources.
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