No matter the brand, LiPo batteries being charged full only to self discharge is a problem. Many people charge all batteries, and fly for 15 min on one, put it back in the case with battery attached. Meanwhile, the other batteries were not used. Those self discharge over the next week. The user recharges all batteries again, flies a bit that weekend, but one battery is not used... it self discharges... Self discharging heats the battery up. NOT GOOD. Heat is the biggest problem for LiPo batteries, and Lipo longevity. After a flight REMOVE the battery from the aircraft immediately. The aircraft belly is a massive heat sink. Heat rises, so you guessed it, it dissipates up toward that already warmed up battery.
Self discharging of batteries is a SAFETY feature, not a method of storage. FLY the batteries until they reach 40-50%, then store them. Charge the batteries needed for the next flight one day prior to the flight.
Just wait until a year or so when all these people start hate spewing Autel when those $200+
E2 batteries crap out!!
LiPo batteries are generally good for about a year or so. First thing you notice is the flight times are lessened on a full charge... "there's your sign".... If you charge a year old battery and instead of getting that 24-25 min charge as you did new ones, and instead it reports 19-22 min... It is likely FAILING. Under load and in hover you will see the flight time change faster. DO NOT fly far when that happens. Damaged Battery typically will only RTH if the battery cells have enough to do so. If they fail in flight, and do not have enough to return, it will emergency land.
Other mfg types tend to swell as they go bad since there is no ventilation. People use those too, and find they have to buy a new drone.
These drones are battery killers. Get used to that part. Batteries are expendables.. get used to that part too. To fly these, the batteries should be in great health. If they are not, do NOT fly any far distances, or fly over water.. you are begging to have to buy a new drone.