This was so sorely needed! I can't tell you how many H520 batteries I have gone through over the past couple of years due to swelling or voltages dropping on individual cells. Once I get 0.2-0.3v out of balance consistently it's time to go. It's interesting how the stock batteries puffed vertically and the high capacity GiFi's did it horizontally...they said that the most important benefit of Li-Ion would be better long term storage behaviour when being fully charged.
I just checked one of the flights from this morning and it was the ellipsoid. I ran NTRIP to our RTK network. I will be testing a casted base for PPK in the next couple of weeks once I have gotten comfortable with this and have some time to take a breath. Seven projects in two days has become a little cumbersome.Did you already check the Exif-Data of the E90X jpegs? Are the GPS altitudes correct? Do they show AMSL or ellipsoid altitude?