Self discharge battery - What and why?

To explain the need for this technology, you must first give a good example. Imagine that you, as usual, have charged your smartphone to 100%. Then they put it on the shelf and, a year later, the battery lost 20% of its capacity. The fact is that Li-Ion batteries, which are already everywhere (in smartphones, electric cars, laptops, watches, etc.), are negatively affected by being in full or zero charge for a long time (even weeks). Therefore, engineers from DJI, knowing that their drones are often thrown onto a shelf with fully charged batteries, gave them the opportunity to discharge themselves up to 60-70% (if the battery is not used for more than a week). The main thing is that this algorithm is sewn directly into the battery controller and does not need to be connected to the drone.

By the way, if you charge a Li-Ion battery up to 60-70% and put it on a shelf for a year, then the degree of degradation will be about 3%. That is why, when buying a new gadget, he arrives partially charged.