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How Long Does It Take to Charge an Electric Bike Battery? 

 September 19, 2021

By  Phil Borges

Electric bike batteries are important components of electric bikes. To ensure that they work well, it is important to charge them appropriately. One part of this process is figuring out how long it takes to charge them.

It can take anywhere between 2 and 6 hours to charge an electric bike battery. How long it takes your electric bike battery to charge depends on a range of factors that include the existing charge level, the kind of battery and how old it is, the output of the charger and more.

In order to determine the charging time in further detail, you can read through the following sections to find all the relevant information you might need.

How Long Does It Take to Charge an E Bike Battery?

You can expect your electric bike battery to take anywhere between 2 and 6 hours to fully charge itself up. For instance, if your battery is completely discharged, you will need to keep it for charging for the entire time period. On the other hand, if there is already a certain amount of charge on the battery, it will take you a much shorter amount of time.

In case your electric bike is completely new and you want to charge its battery for the first time, you should let it charge for 12 hours. It will take that long for it to charge to its fullest extent.

Further, allowing this kind of time to your new bike battery can help prepare the electric bike for use by getting the electric current to reach every possible cell.

Here, it is important to note that the time period towards the end of the charging process is mainly to distribute power to the cells of the battery. It would be better for you to see through this process entirely, but you can also occasionally choose to forego this process.

Factors Affecting Charging Time

There are, of course, several factors that affect how long it will take for your electric bike battery to become fully charged. Let us take a look at what some of these factors are.

Existing Charge Level

The extent to which your battery is already charged can determine how long it will take for full charging. If your electric bike battery does not have any existing charge, it can take approximately 5-6 hours for the charging process.

If it has around 30-40% of charge already, you can expect it to fully charge itself up in 2-3 hours. In fact, it is better to leave a certain amount of charge each time you charge your bike as discharging it completely every time you charge it can be damaging to the battery.

Once in a while, however, you should wait for it to discharge fully. You should also ensure that you don’t end up overcharging the battery as this could reduce the efficiency level and lifespan of the battery.

Type of Battery

Electric bike batteries can come in different types depending on what they are made from. Most commonly, electric bike batteries are either made from lithium-ion or lead-acid batteries.

These two battery types differ from each other on the basis of capacity and weight. For instance, lead-acid batteries have a greater capacity as well as weight as compared to lithium-ion batteries. This means that lead-acid batteries might take a bit longer to charge fully as compared to lithium-ion ones.

Moreover, in the US, you are more likely to find electric bikes make from lithium-ion. You can, therefore, expect the battery to take a shorter amount of time for charging.

Age of Battery

The age of the electric bike battery also matters here. If your battery is a few years old, its capacity will reduce over time and take longer to charge. On the other hand, a newer battery will take you a shorter amount of time and will also be more efficient.

Another thing to know about the age is that the number of charging cycles of older batteries will go on decreasing over time which can impact the charging time. Generally, lithium-ion batteries can offer you at least 500 full charging cycles. As these are used up more and more, you will eventually need to shift to newer batteries.

Charger Output

The output of the charger will also determine how long it might take for your battery to charge. In addition, you must also look at the electricity usage required by the battery itself.

According to these factors, it can take you approximately 2-3 hours for charging a battery that holds 3 kWh, provided that the output of the charger you use is approximately 1.5 kW.

In the case of the charger, you should make sure that you only use the designated charger that came with the bike when you bought it.

Temperature

The temperature conditions around the battery can act as important determinants of the charging time as well. If you keep your battery for charging in extreme temperatures (either too hot or too cold), it will take it much longer to charge itself up fully. This is also not ideal for its efficiency.

For this reason, you must ensure that the temperature is suitable for charging. Moderate temperatures are perfect for this.

How Often Should You Charge an Electric Bike Battery?

How often you should charge an electric bike battery depends on how often you ride the bike. For instance, if you ride the bike daily, it might run out of sufficient charge much quicker.

A general rule you can follow is to charge the battery once it reaches 30-40% of charge. Once in a while, you can let it discharge completely and recharge it fully.

If you want to store your bike for a certain time period, you should charge it beforehand and then on a monthly basis so that the battery does not drain or die out.

Frequently Asked Questions

Can I leave my ebike on charge overnight?

It would not be a very good idea for you to leave your electric bike battery on charge overnight. This is because this can potentially cause it to heat up significantly. In turn, this can adversely affect the functioning of the bike and can reduce its lifespan significantly as well.

In case you have a battery or charger that can automatically switch off when the charging is complete, then leaving it overnight might work. Generally, however, it’s better to avoid it.

If you are charging a new bike battery for the first time, though, it might be okay to leave it overnight as it needs around 12 hours to charge fully.

Should I charge my ebike after every ride?

This depends on the model of the bike and how long it takes for the bike to discharge. If, after every ride, you notice that the battery level drops down to 30%, you might need to charge it every time. This can also depend on how short or long your bike ride is.

If it takes you multiple bike rides to reach a 30% battery level, then you don’t need to charge your electric bike battery after every ride.

Remember, make sure you discharge the battery fully now and then. Moreover, when you are storing it, you can set the charging frequency to once a month.

Can you overcharge an electric bike battery?

You should not overcharge an electric bike battery as this could reduce how it works as well as for how long it works. Unless your charger or battery turns off charging automatically due to in-built features, you should carefully monitor the charging level of your battery so that you can prevent it from overcharging.

Over time, the battery capacity tends to naturally reduce based on the charging cycles. By overcharging the battery early on, you can cause this reduction sooner than expected.

Should I remove the battery from the bike while charging?

You can charge it either way. It will be okay whether you charge it on or off the bike. However, you should ensure that no matter where you charge it, it should be kept away from risky and flammable surfaces.

About the author

Hi, I'm Phil Borges.. thanks for reading.. My wife says I can't shut up about batteries so to save my marriage I've started this blog .. where I'd be ranting about batteries! Please leave a comment if you have any questions, I'm happy to help!

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