Thank you. What about the discharge to 8% every 20 cycles? Do you believe it's needed or no?
That is a bit strange to me. Maybe someone from DJI can expand on this topic.
I have about 120 Lipo batteries. I have about 40 models I fly, everything from 1s indoor 3D planes to 7' Giant scale balsa models flying 6S 6000's. And S800 flying double Lipo 6S 6000's. Most of my Lipos are 3-5 years old and still charge up to 95% or more.
I never fly them below 30% unless I make a mistake or have some kind of emergency, like people on the runway when I have to land, or a few times dogs chasing a plane as I am trying to land. 20% is OK, but that is why I always aim for 30%, after that I consider it imperative to land.
If I am not going to use my Lipo for 24 hrs I fly it down to 50% or so, anywhere from 35% to 70% is OK for storage. I always use balancing chargers, my favorite chargers are Hyperion, they also have storage cycles and breaking in cycles available. I break in a new Lipo like a motor. Fly slow w/o full power and only down to 50% the first 5 cycles. Or use the gentle breaking program on the charger. Never charge a hot Lipo and I always check that cels are even before flying. DJI does a lot of this for you.
I know some batteries have a memory problem if they are not discharged every so often down to 10% or so, but Lipos are not one of them as far as I understand it.
I agree that weight saving is very important on any aircraft, but I can see why DJI is managing these complex batteries as simply as possible. It is quite a chore when I fly my S800 to charge up 12 6S 6000's make sure they are matched pairs and after flying get them all into storage mode. It adds hrs the night before and the night after flying.
I see the Phantoms as a very user friendly product with many aspect we used to have to do automatic. I think this is the direction we are heading in in this hobby. Some of us old guys may grumble, but it does help bring new pilots into the hobby and that is a really good thing.
If you Google managing Lipo batteries you will find lots of in depth articles. These battteries can actually be quite dangerous and have caused many fires. I have personally witnessed 2, they burn like magnesium, very hot and almost impossible to put out. At our AMA field we have buckets of sand for putting out these and Nitro fires. And I always have a fire extinguisher in my truck when I fly. I also use Lipo Safe sacks when I charge Lipos in my truck. At home I charge Lipos on non combustible surfaces with lots of room around the charger and Lipo.
I hope this helps a bit. It is a good idea to become familiar with the battery chemistry you are using.
Fly safe and have a great weekend.