How many amps is a 18650 battery?

Released on Apr. 25, 2022

How many amps is a 18650 battery?

The 18650 battery is a lithium-ion rechargeable battery. Their scientific name is 18650 cells. They have a voltage of 3.7V and have a capacity between 1800 mAh and 3500 mAh. The average charge time for the 18650 battery is about 4 hours. 18650 batteries are larger than AA batteries. They are widely used in the robotics world.

Most 18650 batteries last between 300 and 500 charge cycles. However, these batteries can last beyond these numbers if you regularly charge them before they are fully discharged. Since the 18650 battery is a LiPo battery, it will degrade over time, unfortunately an irreversible process. With proper use, your battery can last for a year or two more.

When choosing the 18650, is it recommended that you use a battery that is slightly above the device's minimum discharge requirements.

18650 batteries are widely used in flashlights, electronics, laptops, vaping devices, and more recently electric vehicles use 18650 batteries. Tesla cars use 7180 of 18650 batteries. Laptops and other electronic devices use more than one 18650 battery, and these devices use protected batteries that contain protective circuitry. Previously, unprotected devices were used in vaping devices, but in recent explosions on these devices, companies are now using only protected devices in these vaping devices.

The 18650 is a lithium polymer battery. This means that if you are familiar with lithium battery technology, you can replace and replace these batteries yourself. However, you need to be very careful as any missteps can lead to fire or even explosion.

What is a high amp 18650 battery?

The high-amp 18650 battery has a capacity of 3100 mAh. Not only does this mean it lasts longer than a traditional 18650 battery, but it also provides 40 amps of continuous discharge. This value is twice that of a conventional 18650 battery. A high amp 18650 battery has a voltage of 3.7V.

The cycles of the 18650 battery are calculated as the battery is charged and discharged. The 18650 battery can be charged up to 4.2V, and as low as between 2V and 3V, this value depends entirely on the battery's cutoff voltage specification.

Discharging happens the moment you start using the battery. The 18650 Li-Ion battery is voltage dependent. Do not attempt to charge the battery if you do not know your voltage. Doing so could have dangerous consequences.

Before using the 18650 battery, you need to test its voltage. This way you can determine if the battery can be used for the purpose you want. Be aware that using a battery without the voltage tested can have catastrophic results.

To test your battery, you will need the following equipment:


Remote Charger

4 trays

Note that the 18650 battery is a LiPo type battery, so you must select the LiPo option in all devices when charging or discharging.

When using an old battery, its voltage must be tested, if any battery shows a value below 2.5V, you need to dispose of the battery immediately as it is not safe to use. When charging a used battery, it is safer to set the post-charge to a low level (eg 0.3 amps) and set the voltage to 3.7V, then start charging.

What are the advantages of a high amp 18650 battery?

There are many advantages to using a high amp 18650 battery, some of which are:

They offer a high capacity of 3100 mAh.

High amp 18650 batteries last much longer than conventional 18650 batteries.

It contains 40 amps of continuous discharge, twice the value offered by conventional 18650 batteries.

It has 3.7V

Its small size means it can be used in many devices without using any unnecessary space.

The electricity they provide is cheap.

They have about four times the storage capacity of ordinary lithium-ion batteries.

They are lightweight.

They can be made in any shape or size.

They are the most durable battery types on the market.

They are used in RC equipment including boats, drones, helicopters, cars, vaping equipment and any other equipment that requires batteries to be light weight.

They are good at pickling a constant voltage while discharging.

Protect Your High Ampere 18650 Battery

Some cheap 18650 batteries have no protection circuit. It is important to protect the 18650 because issues such as overdischarging or overcharging can be dangerous to the device and those using it. Here we will teach you how to make a protection circuit that will protect your 18650 battery.

You first need to get some tools and parts to start creating the circuit.

The required tools and parts are:



wire cutters

some wires

any old cell phone battery

rescue circuit

Grab your cutting tool and turn on the old phone battery. Be careful not to short the circuit or it could cause an explosion.

Now, start cutting the input wires of the circuit.

Check which input is negative and which is positive.

There will be three output pins, one is the signal pin and the other two are positive and negative outputs.

After successfully rescuing the circuit, solder it to the 18650 battery.

Solder the circuit to the 18650 battery

Prepare four copper wires

heated soldering iron

Solder the 18650 cells together using copper wire.

Pay special attention to polarity and try not to short-circuit the battery, otherwise it will cause a fire.

Now, it's time to test your circuit.

Test the protection circuit

Pick up the voltmeter.

Test the output voltage.

If it works fine, then congratulations you created a protection circuit for your 18650 battery and can start using it.

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