You need to know how to charge a lithium-ion battery without a charger since you misplaced it or didn’t bring it with you.

In this post, we offer a few quick tips to get to know you.

If you follow those simple instructions, you may quickly and easily charge your lithium-ion battery without a charger when you are in a need.

But keep in mind that, although theoretically possible (20-36), charging a lithium-ion battery without a charger is risky.


Due to the fact that you are unclear on the battery’s chemistry, voltage, cells, and other specifics.

To charge the battery securely and avoid damaging it, it is thus preferable to have the finest lithium-ion battery charger (50-36).

However, if your battery is dead and you have no other option, you may use the easy methods below to charge your battery immediately.

How to Charge a Lithium-Ion Battery Without a Charger: 5 Simple Methods

I warned you before that battery charging without a charger is undoubtedly risky.

However, if you’re in a bind and have no other choice, you may depend on the following strategies to quickly meet your urgent requirement.

#1. Li-ion Battery USB Port Charging

The quickest and least complicated method to quickly charge a lithium-ion battery (6600-37) without a charger is to use a USB port.

It is both easy and difficult to charge a lithium-ion battery (6600-37) using a USB connection.

Let’s look at the next few measures to simplify your job:

  • Obtain a USB cord that functions as a smartphone charger.
  • Connect the USB end to any USB-capable device, such as your laptop, desktop computer, printer, camera, battery bank, or other electronic device.
  • Take your device and attach the cable’s charging end to the one you wish to charge.
  • Then switch on your computer, laptop, or other appropriate device of your choice.

Your battery will be found to be charging smoothly.

Safety Advice

But before attempting this feat, be sure to follow the safety advice listed below.

For the protection of your device, I urge you to do it.

  • Don’t remove the battery from the gadget you wish to charge.
  • Never use the gadget’s USB port to charge more than one device at once.
  • Never charge a battery that consumes more than 500aM of current since doing so might cause the system to fail.

Can The Battery Be Harmed By USB Charging?

The short answer is that charging your phone using a computer or laptop connector is safe.

However, if you need to rush, there is an issue.

Instead of receiving a quick charge, the battery will be charged gradually.

Therefore, if you wish to charge your battery via a USB connection, you need have adequate patience.

But keep in mind that it’s harmful to often charge your smartphone through a USB connection if you have one.

Why? because your battery cannot always get a constant, reliable current from the USB host.

Therefore, constantly charging a lithium-ion battery through a USB connection from another device risks harming the battery’s chemical components.

And as a result, it may immediately harm your smartphone.

Therefore, it is safe to constantly carry a battery charger.

After all that, it’s advisable to get a new mobile charger that can charge a li-ion battery or fits your mobile phone if you forget to bring your charger.

Your pocket will be spared as well as your mobile device from early harm.

#2. Solar-Powered Lithium-Ion Battery Charging (10-36)

If you’re wondering, yes, a solar panel can charge a lithium-ion battery.

You can accomplish this, I assure you.

You can also charge a lead-acid battery.

However, in this case you will need a charger controller since without one the solar charging system cannot charge any battery.

Therefore, you must purchase a solar charge controller (6600-45) or a high-quality solar inverter if you wish to charge your battery using a solar panel (5400-50).

If not, you must just decline the option.

#3. Utilize A Clip Charger To Charge Your Lithium-Ion Battery.

The use of a clip charger is the next best method for you to charge your lithium-ion battery without a charger.

You must remove the battery from your phone or other device in order to charge it using one of these clip chargers.

The battery must then be placed on the clip charger’s charging platform.

After that, just turn on the charger by plugging it into the power board.

You’ll see that your battery is being charged smoothly.

Keep in mind that these days, this kind of charger is uncommon.

I may say that you are fortunate if you have one.

However, there is a universal USB clip charger (10-44) on the market.

You may purchase a portable battery charger, such as the Lenmar PPUCLIP Universal USB Clip Charger or the Emerging Power EP-SC Battery Charger 3.7VDC 0.8Ax2, and carry it in your luggage.

And if you ever find yourself in a situation where you need to fast charge a 3.7 v li-ion battery without a charger (90-30), you can do it with the help of a universal USB clip charger.

Additionally, it will enable you to charge a backup battery so that you may use it if the one in your smartphone runs out.

Actually, it’s a nice problem to have when you’re in a hurry and forget your charger.

#4. From A Car Battery, Charge Your Lithium-Ion Battery

Are there any other ways to charge a lithium-ion battery without a charger (10–11)? Become calm.

As you are driving your automobile, you have another practical choice.

Your car’s battery may be used to quickly charge your battery.

How? It’s easy.

Simply attaching the battery to your car’s lead-acid battery will allow you to charge it.

However, using such a sophisticated charging method requires using tiny light bulbs to control the current flow.

You could now be wondering how many little light bulbs I should use.

You need to use three little light bulbs to charge a 6V camera battery if your automobile has a 13V lead-acid battery.

To complete the charging task, three bulbs must be placed in a parallel arrangement.

It will let 0.5 amps to the battery so that charging the battery goes smoothly.

then hold off for 10 to 15 minutes.

Your battery will get an adequate amount of charge.

Safety Advice

Observe the following safety precautions to prevent any unplanned harm or mischief:

  • Never go outside while the battery is charged.
  • Limit the amount of charge. It could prevent your battery from catching fire.
  • While the battery is being charged, you should wear a safety mask and goggles since there may be an ignition or spark.
How to charge lithium ion battery using solar panel – Team DIY

#5. Using an Alternative Battery to Charge a Lithium Battery

Another simple method of recharging a lithium-ion battery without a charger is available to you (20-36).

You’ll need 3 AAA batteries to use this straightforward method of charging your battery.

When you first get the batteries, line them up in a sequence before connecting them all.

Each battery has 1.5V, thus the three combined will provide 4.5V.

For a complete charge, a typical mobile phone battery requires 3.7V.

But the combined voltage of the three AAA batteries will be 4.5V.

They will thus easily charge your battery.

But there is one thing you need to remember.

Never try to charge the battery with too much voltage.

Your battery cell might be damaged.

Final Words

After reading my helpful tutorial on how to charge a lithium-ion battery without a charger, you now know all the straightforward methods for charging a lithium-ion battery without a charger (20–36).

Therefore, you may simply charge a lithium-ion battery without a charger by following the above instructions when you are in difficulties losing out or forgetting to bring your usual battery.

But remember that.

Avoid often charging a lithium-ion battery without a charger.

Your battery might get entirely destroyed.

It is better to have an extra standard battery charger (50-40) or a multipurpose USB clip charger (10-44) with you.

It will support you in a time of need and guarantee the battery’s security.

I appreciate you reading the content.

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Written by Bob Matsuoka
Bob Matsuoka is a blogger and founder of RVing Beginner blog. He has been blogging for over five years, writing about his own family’s RV adventures, tips for people who are interested in buying an RV or taking their family on an adventure by RV.