Happened the last 8 or so flights with both batteries. I always launch at 100%. Temperature between 70 and 80F.

My RTH has beeen activated with a low battery warning at 50%. My  threshold is 30%. I've been overriding it and again at 30% it engages like it's supposed to. In each case it triggered RTH at 50% battery when the P3P was less than 500 feet away.

This has happened on 100% of all the flights since the last software update.

Any ideas? Bad batteries? But both started doing this at the same time. I always store 50% to 70% and I've only done 40 some odd total flights (about 20 each battery) so the batteries should still be good for hundreds of flights more if properly stored.

Any ideas?

Happened again this morning but this time at 53%. About 60F outisde. All 4 celles were bouncing between 3.60 to 3.62 at 38% when I finally landed so they were all perfectly even.