How long can I keep my LiPos charged - a scientific approach - RC Groupshttps://www.rcgroups.com/forums/showthread.php?2889967-How-long-can-I-keep-my-LiPos-charged-a-scientific-approach
TL;DR:
If you charged up the packs and do not get to use them the very same day, putting them back to storage voltage immediately is better than even leaving the packs fully charged for only a single day.