Friends who are familiar with drones know that taking DJI as an example, the price of a drone battery with more than 5,000 mAh is nearly 200 dollars, and the price of the 10,000 mAh power bank we usually use is only around 20 dollars. Why is the difference so huge? Doesn't it last longer to use the 10,000 mAh power bank battery on the drone. This is because the polymer lithium-ion battery used by the drone is different from the 18650 battery used by the power bank. The reason why the price is much more expensive is that compared with other smart tech equipment, the drone has stricter battery requirements, so the price must rise linearly. The first factor is performance. The drone needs to overcome its gravity to work functionally. Therefore, the weight of the battery matters a lot. But increasing the battery capacity will lead to a weight increase, in this case, only lighter polymer lithium-ion batteries with the same capacity can meet the specific needs of the drone. On the other ...