How should I store my Air 3 batteries?

After a full charge, what’s the best way to store Air 3 batteries long-term? I read somewhere that running them down to around 40% and letting them self-discharge is the way to go. Anyone confirm?

I keep mine out of the multi-charger and make sure to top them off at least every 3 months. I store them at around 50% inside the cutouts of a hard case with my drones. Been doing this for 6+ years with multiple drones—never had an issue.

DJI has an official guide on this. Check it out: https://support.dji.com/help/content?customId=en-us03400006548&spaceId=34&re=US&lang=en