Biketoworkday is supported by its audience. When you buy through our links, we may earn an affiliate commission. Learn more

How to Charge E-bike Battery Without Charger? – 3 Methods

Written by Gary Johnson / Fact checked by Henry Speciale

how to charge e-bike battery without charger

Electric bicycles are versatile because of their motors that allow us to traverse difficult paths with assistance. However, many of their advantages will be rendered useless if their batteries run out of juice.
There are many ways to charge batteries, even outside these days. But what if you don’t even have your charger on hand? Let’s look at how to charge e-bike battery without charger to prepare for such situations.

Keep reading to learn more.

Three Ways to Charge Electric Bike Battery Without a Charger

Off-grid charging is important for people who want to ride their electric bicycle for days at a time, and doing it from car battery with inverter is a popular method. But what if we want methods that do not use a traditional charger?

Here are 3 reliable ways you can recharge a battery.

Method 1: Charging station


You’re most likely to need ebike charging without a charger while you’re riding outdoors. For such situations, the easiest and most reliable method is to look for a charging station. Fortunately, there are now many places where they are available—some even let you charge your bike for free.

A locker-type E-bike station is one of the better ones to find, as it not only lets you charge your bicycle battery but also has space for recharging your mobile devices, such as your phone or bicycle lights. They’re also easy to use—all you have to do is follow these steps:

  1. Detach your battery from the frame
  2. Activate the station and open the locker
  3. Connect your battery via a USB cable
  4. Lock the door and wait for the charging indicator to signal a full charge

Method 2: With a solar panel


You can use solar power to charge your battery, but this will require specialized equipment to use, along with some cabling knowledge. This system is often used for off-grid charging setups found on vehicles along with a generator or portable charger.

Aside from the panel, we’ll also need an MPPT solar charge controller. Without it, you will damage your battery as the power will be unregulated. Follow these steps to make sure you get the setup right:

  1. Connect the solar panel to the solar charge controller.
  2. Link the charging cable to the controller using a standard tag but do not connect the battery yet; a line with a fuse is recommended.
  3. Configure the MPPT controller using the battery’s recommended amp and voltage. You can do this by clicking the Set button until you get the right voltage.
  4. Set the mode to DC
  5. Connect the battery to the charging cable to begin and wait for the full charge.

Method 3: Pedal charger


This method is a built-in feature available on specific models of certain brands, such as EAhora and Rad Power Bikes. Plus, it can only generate 15-20% of the battery power.

Therefore, using pedal chargers is not something you can use in place of conventional charging; they can only serve as a supplementary source of power. However, since this method allows you to refill your bike battery as you pedal, it can come in handy as well.

To charge the e-bike battery using this method, here’s what you need to do:

  1. Ride the bike normally.
  2. While pedaling, press on the brake to engage the regenerative system.

How Long Does It Take to Charge an E-bike Battery (Factors Affecting Charge Time)


Batteries require 2 to 9 hours of charging time to fully charge, but how long to charge e-bike battery is affected by various factors. Here are some of the biggest ones.

  1. Battery size greatly affects charge time since charging more energy takes longer.
  2. Products with fast-charge technology finish much faster.
  3. Charging batteries with a different charger affects time due to different energy outputs.
  4. Hot weather and high temperatures can slow the charging process, thus, increasing the time needed.
  5. Older batteries take longer to charge due to decreased performance.

Things to Consider for Safety When Charging


We’ve all heard tales of exploding batteries, and while technology has improved to keep such things from happening, it doesn’t hurt to take precautions ourselves. Here are important notes for safety when dealing with e-bike batteries.

  1. Do not leave batteries charging unattended.
  2. Avoid using batteries suspected of damage and chargers not from the manufacturers.
  3. Keep old or damaged batteries outdoors.
  4. Beware of low-quality or refurbished units.

Charging Tips for Longer-lasting and Healthy Batteries

Batteries for electric bicycles typically last 2 to 5 years, but caring for your batteries will allow them to last longer. Here are a few things you can do to keep them working well for longer.

  1. Charge new batteries for 12 hours if charging for the first time
  2. Unplug your battery once fully charged to avoid overcharging
  3. Always use the proper cable and charger from the manufacturer
  4. Place them on even and stable surfaces to avoid fall damage
  5. Keep your batteries charged before storing

Frequently Asked Questions


Should I charge an e-bike battery without a charger?

While you can charge without a charger, it is not recommended. Chargers are designed with a specific battery’s specifications in mind, and using alternative methods often will shorten a product’s lifespan.

Make use of alternative methods if you find yourself in a pinch but stick with the official charger as much as you can.

What happens if the e-bike battery is overcharged?

Overcharging leads to the battery’s lifespan shortening. Its capacity and performance may be affected. There’s also the risk of overheating, which can further degrade item performance in addition to possibly affecting product mileage.

How do I know when my e-bike battery is charged?

Such batteries have indicator lights that change color depending on their status. This system is commonly used for other battery-powered devices, such as mobile phones and electronic devices.

A red light can be seen when the battery is charging, and it turns green once fully charged.

How much does it cost to charge an e-bike?

The cost to charge an e-bike depends on two main factors: battery capacity and the price of electricity.

In the US, it costs $0.05 on average to charge a 36v battery, while the price is slightly lower in the UK and Canada, where the price is $0.04 instead.

Different states in the US also have different power rates, with North Dakota and Nebraska having much lower rates resulting in a cost of just $0.03 compared to Massachusetts, with its high rates coming to a much higher cost of $0.09.


Now that you know how to charge e-bike battery without charger, you don’t have to worry about running out of power even when you’re not at home. You’ll still need an appropriate degree of preparation, but now you know what to do.

Which of these methods do you think seems most useful? Would you be willing to try them out instead of other off-grid charging solutions using a conventional charger? Tell us what you think in the comments section below.

5/5 - (3 votes)