Battery Details, Charging, and Care

The battery and charger that come with Rad Power Bikes ebikes will keep you riding Rad for a very long time. When used as directed, these components can provide years of reliable power and recharging.

Click on a heading below to learn more about the battery Rad Power Bikes uses.

Battery Information


Battery Details

All models use a 7.5 lb, 48V 14 Ah Lithium-Ion battery with 30 Amp Continuous Battery Management System (BMS) and Genuine Samsung 35E cells, rated for 800 full charge cycles.

Charge the battery by using the included 48V 2 Amp charger (or a charger purchased directly from Rad Power Bikes designed specifically for your bike's serial number). The charger is rated for both 110V and 220V AC power outlets, so you don't have to worry about adapters.

A full charge cycle is from completely empty to completely full. Discharging the battery halfway and recharging back to full is only half a charge cycle. You can discharge the battery 50% and charge it back up to 100% twice to equal one complete charge cycle. If you only discharge the battery halfway before recharging normally, your battery will last for twice as many trips!

Battery Life

This depends on several factors, including how frequently an owner discharges and recharges the battery. 

A battery with these specifications will average about 5 years of Rad riding!

Frequent riders: a rider who drains a full battery and recharges it back to full every day, seven days a week, will see about 2.5 years of life from their battery.

Casual riders: a casual rider's battery can last closer to 6-7 years.

Battery Gauge

There are two ways to check a battery's current charge level.

Battery gauge:

  1. Stand at the side of the bike. Make sure you're not sitting on the bike when you check the battery level.
  2. Turn on the battery. Use the key to turn the battery to the on-and-locked position.
  3. Press and hold the button next to the LEDs. The LEDs on the battery gauge will illuminate. The higher number of green LEDs that are illuminated, the higher your current battery level.

    Battery_gauge_button.jpg   Battery_gauge_lit_up.jpg

LCD display gauge:

  1. Locate the LCD display battery gauge. The LCD display shows a battery gauge in the top left corner of the screen when the bike is turned on.

  2. Check the gauge when the bike is not moving. The LCD display gauge calculates battery life based on the battery power output (instantaneous voltage reading) and can fluctuate while riding if power demand and/or output changes. If you are riding, the battery reading should stabilize at the current battery capacity after about 5 seconds when power assist is off (pedal assist 0 and no throttle applied), the brakes are not activated, and while coasting on the bike.
  3. Charge the battery when needed. Charge the battery as soon as possible when only one tick is left on the battery gauge. At lower states of charge, the bike may limit power output to prevent damage to the battery. When the battery is fully depleted, the last bar will begin to flash, warning the user to charge the battery as soon as possible.


Replace or Upgrade the Battery

Our high-quality batteries should provide years of dependable power, but when a spare or replacement battery is needed, it's easy to replace!

The battery can be easily removed with the key, and a spare or replacement battery can be installed in its place on the battery mounting tray on the bike.

We do not currently offer battery upgrades, but you may purchase an extra battery (great for extending your range on long trips!) or a replacement battery HERE.

Caution.png Failure to follow proper charging and storage procedures may result in a non-functional battery, and replacement will not be covered under warranty. Always ensure battery is charged before use. Before each ride, inspect the battery to ensure there is no damage to battery and that it is securely locked to the frame. Charge and store bike and battery in a dry location, between 50 °F - 77 °F (10 °C - 25 °C). Failure to properly charge, store, or use your battery may void the warranty and may cause a hazardous situation. 
Charging & Long-Term Storage

When to Charge the battery

Charge the battery back to full after each ride so the battery is topped off and ready to go the full range whenever you want to 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. If a battery is left empty for an extended period, however, it can become damaged and/or non-functional. 

Charge the battery as soon as possible when the battery bar on the LCD display is flashing. 

How to Charge the Battery

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). See the Help Center article on Removing the Battery 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. Unplug the charger when charging is complete. When one charge indicator light turns green (one will remain red), the battery is fully charged. 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. Remove the charge from the battery once charged. When the charge is complete, one light will illuminate green (the other will be red). Remove the charger from the battery as soon as possible once the charge is complete, and do not exceed 12 hours of charging at a time. 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. The following table provides an estimate of charge time based on most common distances traveled in regular operation:


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 more information on long-term battery storage, check out the article linked HERE.

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.

The battery gives the bikes an expected range of between 25-45 miles on a single charge depending on the level of pedal assist, terrain, and rider size. Using the throttle consumes the most battery power so you can increase your range by sticking to a low level of pedal assist (0-2).

Take a look at the image below to get an idea about how far you can go on a single charge.


Battery Usage


The battery can be removed using one of the two identical keys included with your bike.

Battery Controls

On, locked


Off, locked


Off, unlocked


Remove the Battery

  1. Turn off the bike. Press and hold the MODE button on the LCD Display remote (or the power button on the LED remote) until the display turns off.
  2. Use the key to turn off and unlock the battery. Insert the key into the key port, then push and rotate the key to the "OFF, unlocked" position.
  3. Remove the battery. When in the "OFF, Unlocked" position, you can carefully slide the battery upwards and lift it off the frame. Note: the battery weighs around 8 lbs and should be handled with care.


For more information on how to best care for your battery, please refer to the Rad Power Bikes Owner's Manual that came with your bike or download a copy of your bike's manual from HERE

When the Battery is Removed

  • Do not touch the “+” and “-” terminal contacts on the bottom of the battery when the battery is removed from the bike.
  • Be careful not to drop or damage the battery when loose from the bike.
  • Avoid damaging the exposed connector terminals and keep them clear of debris.

 When Installing the Battery

  • Ensure the battery is turned off before sliding the battery into the frame mount receptacle.
  • Do not force the battery onto the receptacle; slowly align and push the battery down into the receptacle.
  • Ensure the battery has been properly secured to the bike before each use by carefully pulling upwards on the battery with both hands to test the security of the attachment of the battery to the mount.

Warning_-_Transparent.png Use caution to avoid damage to battery connector terminals, which are exposed when the battery is unlocked and removed from the frame of the bike. In the case of damage to the terminals or battery mounts, please discontinue use and contact Rad Power Bikes Product Support immediately.

Balancing the Battery

Battery Balancing

Balancing the battery is an important step to help keep your battery in great shape for years to come. When you first receive your bike and for the first three times you charge your battery from Rad Power Bikes, follow the procedure outlined below to 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. Charging normally before the first ride is also fine.

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. Check out the following charging recommendations.
    • 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 leaving the battery charging for longer than 12 hours.
    • Never leaving the battery/charger unattended while charging.
Lost Keys
Your bike comes with two identical keys to turn your battery on and off. These keys are unique to your bike. For help with lost keys, please contact us and we'll help get you back up and running!

Questions or comments? Contact us!


Phone: (800) 939-0310 x 2