Which is better, polymer lithium battery or 18650 battery?

The shape of polymer lithium batteries can be customized arbitrarily, and ultra-thin batteries can be micro manufactured, such as 0.25mm. Therefore, mobile power supplies with polymer lithium batteries can also be designed to be more flexible in appearance. Many smart wearable devices now use lithium polymer batteries for their batteries. This can make the product more fashionable in appearance design.

The appearance of 18650 batteries is fixed and low in the field of batteries. Similar to battery number 5. Generally speaking, its outer shell is cylindrical steel and its interior is a liquid lithium-ion electrolyte. The 18850 battery can only be seen as a pillar. If the mobile power supply you purchased has a thick and large shape, you can basically confirm that you are using an 18650 battery.

Polymer lithium batteries and 18650 batteries of the same volume have a larger capacity, approximately 30% higher. If purchasing a large capacity portable power supply, it is better to choose polymer batteries, which are more lightweight and portable. The capacity of 18650 batteries is relatively small. The capacity of 18650 batteries generally depends on three specifications: 2200mAh, 2400mAh, and 2600mAh. For mobile power supplies using 18650 batteries, the above specifications are basically applicable. It can be imagined that the shape of the 8000 mAh+18650 portable power supply must be relatively large.

Polymer lithium batteries have a cycle charge and discharge rate of over 1000 times higher than 18650 batteries, with no significant decrease in capacity. 18650 batteries can be charged and discharged more than 500 times, resulting in a capacity reduction of about 30%.

Polymer lithium batteries are coated with a layer of aluminum film on the outside, and then coated with high-strength adhesive tape. They will not explode, but may only cause air bubbles. In the worst case, they may cause combustion and fire. Therefore, compared to 18650, polymer batteries are still very flexible. Due to the special nature of the 18550 battery packaging (steel shell), it is easy to experience short circuits. If the quality of the produced product does not meet the standards, the major risk is explosion.

Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.