How Long to Recharge eBike Battery

How Long Does It Take to Charge an Electric Bike?

One of the most common questions from eBike owners is often about how long it takes to charge their bike. It is a piece of vital information to have to be able to plan for future rides.

Typically, it takes between 2 and 7 hours to fully charge an electric bike battery. However, some high-capacity batteries may take longer, and some fast chargers may charge the battery more quickly.

This article details how long it takes to charge an eBike and other helpful information for riders.

Charging eBike Batteries
Charging eBike Batteries

When should I start recharging my eBike battery?

It would be best if you started recharging your e-bike batteries when the battery level drops to around 30-60%.

Lithium-ion batteries, commonly used in e-bikes, have a limited number of charge cycles. Completely discharging the battery can reduce its overall lifespan.

Recharging the battery when it reaches 30-60% can help extend its lifespan and ensure you have enough power for your next ride. In addition, if you don’t use the bike within the next day, it is only sufficient to charge up to 80%.

Some eBike Manuals From Popular Companies Detailing Charging Batteries

I always recommend reading what YOUR owners manual says about charging. Below are some popular models with the manuals.

Can I leave my eBike on a charger overnight?

Leaving your e-bike on a charger overnight is generally safe. Furthermore, most modern e-bikes have built-in safety features to prevent overcharging or damaging the battery.

In most cases, when the battery charges entirely, the power is cut off by a built-in internal mechanism. Read more about this in my article about BMS. Here’s a link 👉 What is BMS and How Does it Work?

Some e-bikes have chargers that automatically switch to a maintenance mode once the battery reaches a fully charged state. In contrast, others may have a timer or a charging indicator that shows when the battery charging finishes.

It is a good practice to periodically check the battery and charger for any signs of damage, overheating, or other issues to prevent damage during charges.

It’s essential to use a charger designed for your e-bike model and avoid using generic or low-quality chargers. Poor-quality chargers can damage the battery or cause safety hazards, especially if you leave the eBike charging overnight.

RIDE eMTB Tip: Want to learn more about charging overnight? Check out this article 👉 Can I Charge My eBike Overnight?

Do electric bikes charge when you pedal?

Typically, electric bikes do not charge while pedaling. Still, some of the most recent models allow riders to recharge their bikes while pedaling or breaking. This option is called regenerative braking on an eBike.

In the last case, when you brake or stop pedaling, the motor can reverse direction and act as a generator. Doing this converts kinetic energy into electrical energy that you can store in the battery.

However, the energy generated through pedaling or regenerative braking is typically meager. Therefore, more is needed to significantly extend the battery’s range or reduce the need for external charging.

Given these considerations, the primary way to charge an e-bike battery is through an external charger plugged into a wall outlet.

Recharging an eBike from a regular outlet
Recharging an eBike from a regular outlet

Should I charge my ebike after every ride?

It is unnecessary to charge your e-bike after every ride. Still, it is a good idea to recharge the battery regularly to maintain its performance and extend its lifespan.

If the battery level drops to 60% after your ride, it is a good idea to recharge. If it drops after every ride below 60%, you should charge it each time. 

But generally, the charging frequency depends on how often you use your e-bike and how much battery capacity you typically use during each ride. Therefore, recharge the battery at least once a week if you use your e-bike regularly, even if you use up only some battery capacity.

It’s also essential to avoid letting the battery discharge completely, as this can shorten its lifespan.

Finally, following the manufacturer’s instructions for charging and maintaining your e-bike battery is good practice. It can help ensure its optimal performance and lifespan.

How much does it cost to charge an electric bike?

The average cost to charge a full discharged eBike battery is $0.14 to $0.10 depending on the cost of electricity and the capacity of your bikes battery.

My bike has a 52 volt, 17.5 amp hour which equates to 910 watts. Now I divide 910 watts by 1000 for the KiloWatts per Hour for me this is .91 KWh.

With the average cost of electricity in the United States around $0.1524/KWh. Now multiple $.1524 by .91KWh which equals $0.1386. Now my bike has a bigger than typical battery. A smaller battery like my wifes is about $0.10 to charge. (48 v x 13.5 ah = 648 watts or .648 KWh times $.1524 = $0.0987.)

The cost of charging an electric bike depends on the capacity of the battery, the cost of electricity in your area, and the efficiency of the charging system.

On average, an e-bike battery capacity ranges from 250Wh to 750Wh, and electricity costs vary from region to region and from time to time. As of 2023, the average cost of electricity in the United States is around $0.1524/kWh.

Remember that the actual cost of charging an e-bike battery may vary. It depends on the e-bike model, battery capacity, charging efficiency, and any additional charges or fees that may apply.

Bafang Mid-Drive Electric Bike Conversion
Bafang Mid-Drive Electric Bike Conversion

Did you Know You Can Convert a Regular MTB to Electric?

Bafang a leader in DIY electric bike conversions has a mid-drive kit that will fit on most regular bikes. I’d recommend the BBSHD kit, it’s a complete setup with a huge capacity battery and a 1000 watt motor. Why this setup?

  • Heavy duty 1000 watt motor (built for cargo bikes)
  • +50 volt 17.5 Ah battery for speed and distance
  • Easy installation with provided tools.

If you’re considering a conversion, do what I’m doing get the BANFANG BBSHD 1000w eBike Conversion with Battery

Can electric bikes be charged at home?

Electric bikes can be charged at home using a standard electrical outlet. Most e-bikes come with a charger that you can plug into a regular household outlet, similar to a laptop or cell phone.

Generally, it takes between 2 and 7 hours to fully charge an e-bike battery. The charging process should be done in a well-ventilated area, away from heat sources or flammable materials.

How long does it take to charge a 48v eBike battery?

It takes 4 to 8 hours to fully charge a 48V e-bike battery using a standard charger that comes with the bike.

However, some e-bike models have faster charging systems that can reduce the charging time to 2 to 4 hours, depending on the battery capacity and charging current. A fast charger will be sold with a higher amp output.

Choosing between 36v and 48v Battery on eBike

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How to select a charger for an eBike Battery

How to Choose a Charger for an eBike

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Frequently Asked Questions

How long should you charge the ebike the first time?

In general, it is better to fully charge the battery before using the eBike for the first time and to charge it for the amount of time recommended by the manufacturer, typically around 2 to 8 hours. Usually your charger signifies a full charge with a green light and automatically turning off.

Should I remove my eBike battery when not in use?

It is generally a good habit to remove the eBike battery when not in use for an extended period, such as over the winter or when you will not use the bike for weeks. Leaving the battery in the bike while not being used can cause it to slowly discharge over time, leading to decreased battery life and performance.

Do electric bikes use a lot of electricity?

On average, an electric bike uses around 20-30 watt-hours per mile, so a full battery charge can last for dozens of miles of riding. Of course, the exact amount of electricity used will vary depending on the specific model of the eBike and how you use it. Still, in general, eBikes are a very energy-efficient form of transportation.


David Humphries Author at Ride e MTB

Hi David Humphries here the guy doing all the pedaling behind the scenes with this blog. I’ve been in the MTB world for a while and recently started getting into eMTBs. You can check out more about me HERE and on my other passion project – DIYMountainBike.com

Resources: 

  1. Electrifybike.com, “Charging and caring for your lithium-ion eBike battery,https://www.electrifybike.com/blogs/news/charging-and-caring-for-your-lithium-ion-ebike-battery, last accessed February 14, 2023
  2. Electricbiketricks.com, “Can I leave my eBike on charge overnight—solved,” https://electricbiketricks.com/can-i-leave-my-ebike-on-charge-overnight-solved/, last accessed February 14, 2023
  3. Hovsco, “Do e-bikes charge while pedaling or breaking,”https://www.hovsco.com/blogs/blogs/do-e-bikes-charge-while-pedaling-or-braking#:~:text=The%20latest%20way%20to%20charge,the%20power%20to%20continue%20riding, last accessed February 14, 2023
  4. Utility dive,“ Retail electricity prices continue rapid rise in utility debt,” https://www.utilitydive.com/news/retail-electricity-prices-continue-rapid-rise-utility-debt-growing/631496/#:~:text=The%20average%20price%20of%20electricity,latest%20Short%20Term%20Energy%20Outlook, last accessed February 14, 2023
  5. The Bike Fetcher, How long to charge a 48V eBike battery,” https://thebikefetcher.com/how-long-to-charge-48v-ebike-battery/,last accessed February 14, 2023