Which is better for power bank, 18650 or polymer batteries?

25 Feb.,2022

Early mobile power gives most users the impression that it is big and heavy, while today's mobile power is very small, especially the shared ones. Those who have used them will feel very light.

 

Early mobile power gives most users the impression that it is big and heavy, while today's mobile power is very small, especially the shared ones. Those who have used them will feel very light. This is a credit to the polymer lithium-ion battery. In fact, many electronics can perform better thanks to polymer lithium-ion batteries, such as TWS Bluetooth headphones and special small electronic devices. Unlike a few years ago, fewer and fewer 18650 lithium-ion batteries are used in usb connector. Are they really being phased out? Besides size and weight, what is the difference between polymer Li-ion batteries and 18650? That's what we'll discuss today.

 

Power Bank Battery Portable Charger

 

What is an 18650?

There are two important types of batteries on the market today, one is the lithium-ion battery and the other is the polymer battery. Lithium-ion batteries generally refer to aluminum-cased batteries, the electrolyte is liquid, and the outer packaging material is aluminum case or nickel-plated With the continuous elimination of steel cases in the market, 18650 has become the standard configuration of lithium-ion batteries people are most willing to use. The so-called 18650 is a cylindrical battery with a diameter of 18mm and a length of 65mm. The "0" is stated as a cylinder that looks like a large AAA (No. 5) dry cell.

 

Many people think that 18650 batteries will soon become obsolete. In fact, this is not the case. Panasonic, Samsung and Sony are currently in the business. There are also many factories that continue to produce it, as most electric cars use 18650 batteries. The most famous one is Tesla, with a full car of 18650 batteries. In fact, most mobile power products do not use this battery, more for cost and style reasons. At present, 18650 power bank products are either low-end or high-end, so 18650 is not the battery to be eliminated, but towards the two extremes.

 

What is a polymer lithium-ion battery?

Since its inception, polymer lithium-ion batteries have many advantages such as ultra-small, ultra-thin, ultra-light, highly malleable, and high safety. Based on these advantages, polymer lithium-ion batteries are more in line with people's pursuit of appearance. When used in mobile power, the thickness of mobile power can reach less than 10mm, and can also be made into some special shapes. Compared with the fixed appearance of 18650, it is easier to make personalized changes. Moreover, the safety of Li-ion polymer batteries is very high. Even if there are problems, most of them will not explode and will only expand, which is very attractive to both manufacturers and consumers.

 

Which one do we choose?

After talking for half a day, let's summarize. In terms of advantages, 18650 technology is more mature, and there are many big manufacturers still developing and processing. Safety is actually better than polymer lithium-ion batteries. Of course, you must use the products of regular manufacturers. 18650 also has obvious disadvantages, the appearance is easily limited, and the low-end products have safety risks.