E-Bike Batteries: Understanding Voltages, How to Test Them, and Care Tips

Understanding and maintaining your e-bike battery is key to a smooth and reliable ride. This guide covers different battery types, how to test them with a multimeter, and essential care tips to ensure longevity and peak performance.

Battery Types and Systems

  1. 36V Battery System
    • Description: Our 36V batteries are designed to provide efficient and reliable power for your e-bike, ensuring a smooth ride with ample range for daily commutes or leisurely rides.
    • Expected Voltage: When fully charged, a 36V battery typically shows between 36V and 42V on a multimeter.
  2. 48V Battery System
    • Description: The 48V batteries offer enhanced power and performance, ideal for longer rides or more demanding terrains.
    • Expected Voltage: A fully charged 48V battery usually reads between 48V and 54.6V on a multimeter.
  3. 48V Dual Battery System
    • Description: For those who require extended range and superior performance, our 48V dual battery system connects two 48V batteries in parallel, doubling the capacity while maintaining the same voltage.
    • Expected Voltage: Like the single 48V battery, each battery in the dual system should show between 48V and 54.6V when fully charged. The combined voltage remains 48V, but the capacity (Ah) is doubled.

How to Test Your E-Bike Battery with a Multimeter

Testing your e-bike battery's voltage with a multimeter is a straightforward process. Follow these steps:

  1. Set Up the Multimeter:
    • Turn on your multimeter and set it to measure DC voltage (denoted by a V with a straight line or a dashed line above it).
  2. Prepare the Battery:
    • Ensure the battery is turned off and disconnected from the e-bike.
  3. Measure the Voltage:
    • Connect the multimeter probes to the battery terminals: the red probe to the positive terminal (+) and the black probe to the negative terminal (-).
    • Read the voltage displayed on the multimeter screen.

Expected Voltage Ranges

  • 36V Battery: 36V to 42V
  • 48V Battery: 48V to 54.6V
  • 48V Dual Battery System: Each battery should read 48V to 54.6V, but the total capacity is doubled.

How to Calculate Watt-Hours

Watt-hours (Wh) is a measure of the battery's energy capacity. It is calculated by multiplying the voltage (V) by the ampere-hours (Ah). Here's how to calculate it for different battery types:

  1. Formula:
    Watt-Hours (Wh)=Voltage (V)×Ampere-Hours (Ah)
  2. Examples:
    • For a 36V battery with 9.7Ah: 36V×9.7Ah=349.2Wh36V \times 9.7Ah = 349.2Wh36V×9.7Ah=349.2Wh
    • For a 48V battery with 10.4Ah: 48V×10.4Ah=499.2Wh48V \times 10.4Ah = 499.2Wh48V×10.4Ah=499.2Wh
    • For a 48V battery with 15Ah: 48V×15Ah=720Wh48V \times 15Ah = 720Wh48V×15Ah=720Wh

Battery Care Tips

Proper care of your e-bike battery is essential to maintain its performance and longevity. Here are some important tips:

  1. Regular Charging:
    • Charge your e-bike battery every couple of months, even if it hasn't been used. This helps maintain the battery's health and ensures it is ready for use when needed.
  2. Avoid Deep Discharge:
    • Do not allow the battery to fully discharge regularly. Keeping the battery within the optimal voltage range extends its life.
  3. Storage:
    • Store the battery in a cool, dry place away from direct sunlight and extreme temperatures.

Battery Care Manual

For more detailed information on how to care for your e-bike battery, please refer to our Battery Care Manual.

Importance of Regular Charging

If a battery is not charged regularly, it may discharge completely and become difficult to recharge. In such cases, the battery may need professional repair, which includes rebalancing the cells to restore its functionality. This process should be done by a battery repair specialist to ensure safety and proper performance. This is a cheaper and more environmentally friendly alternative to replacing your battery. 


Regularly testing and properly caring for your e-bike battery helps ensure optimal performance and longevity. By understanding the expected voltage ranges, testing procedures, care tips, and how to calculate watt-hours, you can keep your e-bike running smoothly and efficiently.

For more information or assistance, please contact our customer support team.

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