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Battery Charging Guide

Follow this guide to learn how to charge, balance, and store your battery. Click the headings below for more information.

How to Charge the Battery

Charging Guidelines

Always charge in a safe area that is dry, indoors, between 50 °F – 77 °F (10 °C – 25 °C), and away from direct sunlight, dirt, or debris. Arrange the bike, battery, and charger to eliminate the potential to trip on the charging cord, or for damage to occur to the bike, battery, or charging equipment while parked and charging. 

  1. Turn the battery off using the key and the key port (1, below). Leave the battery locked to the frame for charging, or, if needed or desired, use the key to unlock the battery and remove it from the bike before charging. Click HERE for more information on the "OFF, locked" and "OFF, Unlocked" key positions.

  2. Remove the rubber cover on the charging port on the side of the battery (2, above).
  3. Plug the charger into the battery charging port (2, above).
  4. Plug the charger into an appropriate power outlet. With the battery either on or off the bike, plug in the charger. When plugged in, you will see two red lights illuminate to show that the battery is charging.
  5. Charge for the appropriate amount of time. Charging a battery from empty to fully charged typically takes between 3-7 hours. It is best to unplug the charger as close to the battery being fully charged as possible, ideally within the hour. The charger will show when the battery has been charged fully by turning one of the charge indicator lights from red to green (one will remain red). Do not exceed 12 hours of charging at a time. The charger is designed to automatically stop charging when the battery is full, but unnecessary wear of the charging components could occur if the charger is left attached to the battery and a power source for longer than 12 hours. Detach the charger as soon as possible once the green light indicates a complete charge to avoid unnecessary wear of charging components. 
  6. Once charged, unplug the charger from the power outlet. Unplug the charger from the outlet first, by pulling on the plug. Do not remove the plug from the outlet by pulling only on the cord.  

    For more detailed information on battery charging and maintenance check out your Owner's Manual, available for download HERE.
Caution.png Do not use a battery or charger not purchased directly from Rad Power Bikes. Aftermarket or third-party products have not been tested for safety and compatibility with our bikes and use of these products could cause issues, including property damage, voiding your warranty, or injury/death.

Battery Charging Times

Charging the battery from completely empty to completely full typically takes between 3-7 hours.  We recommend charging after each ride so your battery can power you for the full range the next time you Ride Rad! 

The time the charger takes to fully charge the battery is dependent on various factors including distance traveled, riding characteristics, terrain, payload, and battery age. Take a look at the table below for more details.


Battery Balancing Guide

Balancing the battery is an important step to help keep your battery in great shape for years to come. After the first three times you ride your ebike from Rad Power Bikes, follow the special "balancing" charging procedure outlined below, which will ensure the cells that power the battery are balanced and operating as efficiently as possible.

Note: A new bike battery should arrive with between 50-75% of a charge and can be ridden without initially charging once assembled and verified as safe by a local, certified, and reputable bike mechanic.

When to balance the battery

  • After a period of long-term battery storage
  • If experiencing noticeable range decline
  • When instructed to do so by Rad Power Bikes Product Support
  • Up to once per month with frequent use as proactive battery maintenance. Do not perform battery balancing more than once per month

Battery Balancing Guide

  1. Charge the battery after the first three rides. After the first, second, and third ride, regardless of distance ridden or the amount of battery used, charge the battery and leave the charger attached to the battery and the outlet for as close to 12 hours as possible (but not longer than 12 hours). This may require leaving the charger attached to the battery and outlet even after the charger illuminates one green (and one red) light indicating the battery is full.
  2. Disconnect the charger. Disconnect the charger from the outlet, then the battery, once the first balance charge (long charge as close to, but not longer than, 12 hours) is complete and store the bike until you are ready for your next ride.
  3. Ride the bike. Ride with power assistance as normal, and discharge part (or all) of the battery capacity.
  4. Repeat steps 1-3. Repeat the steps for a total of three balance charging sessions (as close to, but not longer than, 12 hours).
  5. Charge normally after the third balance charge and fourth ride:
    • Charge the battery after each ride according to the Battery Charging & Long-term Storage section above.
    • Remove the charger from the battery as close to the green charge light indicating the battery is full, which will typically occur between 3-7 hours.
    • Never leave the battery charging for longer than 12 hours.
    • Never leave the battery/charger unattended while charging.
Storing the Battery Long-Term

Long-term Battery Storage

To get the most life out of your battery, proper use and charging is key, including when the battery is stored for long periods of time in between uses.

For battery storage longer than two weeks, the battery should be kept at around 75% charged, powered off, and stored in a dry place between 50 °F and 77 °F (10 °C and 25 °C). The battery should be checked every month, and if necessary, charged to around 75% charged.

Store the battery correctly when experiencing extreme temperatures. Using the battery in extreme temperatures and conditions, as well as how the battery is charged and stored can also have an impact on the overall lifespan of the battery.

For an in-depth article on how to best maximize your battery life, check out this article on the RPBlog!

Caution.png Do not leave a charging battery unattended. Never charge a battery for more than 12 hours at a time. Failure to follow battery charging best practices could result in unnecessary wear to the charging components, battery, and or charger, and could lead to an under-performing or non-functional battery and replacement will not be covered under warranty. Failure to follow battery charging best practices could result in unnecessary wear to the charging components, battery, and or charger, and could lead to an under-performing or non-functional battery and replacement will not be covered under warranty.

Click HERE for more information about our battery and HERE to learn about how to remove the battery and check the charge level. 


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