What factors should a good quality 18650 battery have?

Released on Jun. 07, 2022

What factors should a good quality 18650 battery have?

Let's start by understanding what an 18650 battery is. We can assume that we know them because we are in the market for these batteries.

Batteries get their name because of their size. They measure 18mm x 56mm, hence the name 18650. they are a little larger than the regular AA batteries, have more capacity and perform better. Most people today prefer them, both primary and secondary.

These batteries offer the performance of lithium batteries. They are available in different capacities from 1800mAh to 3500mAh with a nominal voltage of 3.7V. You can find some of them connected to battery packs in high power consumption devices such as laptops and mobile power.


The following are the characteristics of premium 18650.


Long battery life

The first and most important thing to look for in an 18650 is its longevity. As many of you already know, lithium batteries will disconnect even when they are not in use. This means that they have the same shelf life as when you use them. Consider using batteries that will last longer. Essentially, this should be the one that has recently left the manufacturer's factory.



Quality batteries are related to voltage. This is the power that will flow into and run your device. A good quality 18650 battery should have a voltage of 3.7V. This is the nominal voltage. Some fake 18650's don't even reach 2.0V. There are bad dealers who rename worn out 18650 batteries and bring them back to the market. Such batteries will be a huge waste of your time and money. This is why you need to know how to measure voltage.



How big is the battery? This determines how much power the battery will hold. The higher the capacity, the better the battery. As mentioned above, even strong batteries like the 18650 will lose the ability to hold power over time. If you're not careful, you'll buy one that has already lost this capacity. Don't buy a battery just because they're new. Take one because they will serve you longer.


Secondary Batteries

There are 18650 batteries that are non-rechargeable, called primary batteries and other rechargeable; secondary batteries. Your choice should depend on the device you are using and how much power you need. For devices such as digital cameras, both rechargeable and non-rechargeable 18650s can be used. However, for other devices, you must make sure the battery is rechargeable.


Compatible with your device

Just because a battery is powerful doesn't mean it's good for your device. Check the type of battery in your device before replacing it.



There have been many cases of 18650 batteries catching fire in the past. You need to identify a device that has passed all the tests to ensure safety.


How do I choose a good quality 18650 battery?

Unfortunately, 18650 is not the standard battery. To impress users, different manufacturers come up with different features. As a result, there are many variations of these batteries, which can make it difficult to choose, especially for first-time users.

However, there are a few things you should ask about to make your selection easier. The first thing to consider is the continuous discharge rating (CDR). This is also known as the amperage capacity.

What factors should a good quality 18650 battery have?cid=3

The current in a battery is measured in amperes (A). One of the biggest drawbacks of high-capacity batteries is that they overheat when this current is drawn from them. the CDR is the rate at which this process occurs. Therefore, to be on the safe side, use your device to draw the CDR of the 18650 you purchased. this way, you will find no risk of overheating of the battery.

This means, therefore, that one must be sure of the brand they are buying. Not all brands have the best features for batteries. They are not user-centric and often end in disaster. But there are many others that focus on providing only the best quality. Take the time to research and buy batteries from brands that guarantee the best performance and long life.


What brand of 18650 batteries are of good quality?

The key to buying a quality 18650 is knowing the brands you can trust. We took the liberty of listing once and some of their products to make your job easier.

Sony. This giant electronics manufacturer makes 18650 batteries like the Sony VTC5A and A and Sony VTC6.

Samsung. The Samsung 25R and 30Q are the best on the market.

LG. They come with the LG HD2 and LG HG2


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