The information in this article applies to the external batteries provided with most of the ebikes from Rad Power Bikes. For information on the semi-integrated batteries for the RadRover 6 Plus, please refer to its Owner's Manual, which is available HERE.
Follow the steps in this guide to learn how to charge, balance, and store your external battery.
Battery Charging Details
Where to charge
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 for trip hazards, damage to the bike, battery, or charger.
When to charge
A new battery should arrive with between 50% and 75% of a charge. You can ride the bike right away, without charging, once the bike is assembled and verified as safe by a local, certified, and reputable bike mechanic. After the first ride, a new bike or a bike with a new battery should complete the battery charging process outlined in the Battery Balancing section.
We recommend charging the battery fully after each ride so your battery can power you for the full range the next time you ride Rad! The battery has no "memory" so you can charge your battery after each and every use, even if you just take a spin around the block.
A battery with a partial charge can be left without immediately charging back to full. It should be charged as soon as possible when the battery bar on the display is flashing to indicate the battery is low.
How long to charge
Charging the battery from completely empty to completely full typically takes between 3–7 hours. Charging time depends on various factors including distance traveled, riding characteristics, terrain, payload, and battery age. Take a look at the table below for more details.
|5 mi (8 km)||1 hour|
|10 mi (16 km)||1.5 hours|
|15 mi (24 km)||2.5 hours|
|20 mi (32 km)||3.5 hours|
|25 mi (40 km)||4.5 hours|
|30 mi (48 km)||5.5 hours|
|45 mi (72 km)||7 hours|
Battery Charging Steps
Follow the steps below to learn how to charge the battery. If your battery is new, ensure you follow the steps in the Battery Balancing Steps section to help keep your battery in great shape.
- Turn off the battery. Use the key to turn the key barrel to the "Off, locked" position. Note: The battery can be charged when locked on the bike or unlocked and removed from the bike.
- Remove the rubber cover on the charging port and insert the charger into the charging port.
- Plug the charger into an appropriate power outlet. When the charger is plugged in, two red lights will illuminate to show that the battery is charging.
- Charge the battery, making sure to not charge for longer than 12 hours at a time. When the battery is fully charged, one LED will turn green and one will remain red (shown below).
Note: 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.
- Once the battery is charged, unplug the charger from the power outlet. Unplug the charger from the outlet by pulling on the plug. Do not remove the plug from the outlet by pulling only on the cord.
- Unplug the charger from the battery. Store the charger in a safe place for future use.
Battery balancing is an important process to help keep your battery in great shape for years to come. This process will help ensure the cells in the battery are balanced and operating as efficiently as possible.
The process will involve riding your bike, then charging the battery after each of your first three rides. After completing the battery balancing process, charge normally as needed, and only repeat the battery balancing process when recommended. Battery balancing should be done when a battery is new, after a period of long-term battery storage, if experiencing noticeable range decline, if instructed to do so by Rad Power Bikes Product Support, or up to once per month.
Note: Do not perform battery balancing more than once per month.
Battery Balancing Steps
Follow the instructions below to balance your battery.
- Take a look at the Battery Charging Steps in the section above to learn how to charge the battery.
Note: Never leave a battery unattended while charging.
- Take your first ride. Ride the bike and use power assistance (the pedal assist system or the throttle) normally.
After your first ride: Charge your battery for as close to 12 hours as possible, but not longer than 12 hours. Charge the battery even if you only used a small amount of battery power while riding. The charger indicator lights may change to green and red to show that the battery is full, but keep the battery plugged in and charging for as close to 12 hours as possible.
- Take your second ride. Ride the bike again and use power assistance (the pedal assist system or the throttle) normally.
After your second ride: Charge your battery again for as close to 12 hours as possible (even if the charger indicator lights turn green and red). Do not charge the battery longer than 12 hours. Charge the battery even if you only used a small amount of battery power while riding.
- Take your third ride. Ride the bike again and use power assistance (the pedal assist system or the throttle) normally.
After your third ride: Charge your battery again for as close to 12 hours as possible (even if the charger indicator lights turn green and red). Do not charge the battery longer than 12 hours. Charge the battery even if you only used a small amount of battery power while riding.
- Take your fourth ride. Ride the bike again and use power assistance (the pedal assist system or the throttle) normally.
After your fourth ride and beyond: Charge your battery after each ride by following the Battery Charging Steps in the previous section. Remove the charger from the battery as soon as you see the charging indicator lights on the charger change to one green and one red light to indicate that the battery is fully charged. This usually happens within 3–7 hours of charging.
For more detailed information on battery charging and maintenance, check out your owner's manual, available for download HERE.
If storing your bike from Rad Power Bikes for longer than two weeks at a time, follow the recommendations below to maintain the health and longevity of your battery.
- Charge (or discharge) the battery to approximately 75% charged.
- Power off the battery either locked to the frame or unlocked and removed from the frame for storage.
- Store the battery in a dry, climate controlled, indoor location between 50° F–77° F (10° C–25° C).
- Check the battery monthly, and if necessary, use the charger from Rad Power Bikes to charge the battery to 75% charged.
- Complete the battery balancing process in the previous section after a period of long-term storage and before the first ride. This process will help ensure the cells in the battery are balanced and operating as efficiently as possible.
For more information about how to best maximize your battery life, check out this article on the RPBlog!