You are lucky that DJI must still have A3S stock in Texas. If it needed to come from stock out of the country, DJI would be willing, but US customs, not so much.
My UPS delivery also made it today. Nothing as fun as an A3S though!
I think that is what I am trying to glean here. If it is not a big a deal if only partially charging then it's down to just get a good brand third party charger that facilities a storage charge and you should be good to go.
I have never had any...