I mean that's up to you personally if you have lipos laying around the house I would keep them in a fire safe bag because in the end the DJI batteries are a lipo they just have some smart electronics in them that make them more safer but you never know what could happen yeah man use a fire safe bag or some kind of ammunition box trust me I've seen lipos do some weird stuff.... You should always watch your lipos charge too I mean not hawk them but at least be in the same room or close by I even do this with the DJI lipos ya know.... At least I'm there and if something was to happen I could try to take care of it. ideally and a smart way to do it is if you have a shed or some type of garage you should charge out there. Honestly the smart thing to do is to not charge in your house where you have kids and family. I say this but I don't actually do it I still charge in my house I just keep an eye on them. About 5 years ago I had a 45C turnigy 3s lipo go up while charging what happened and what alerted me was the sweet smell of only way I can describe it was like nail polish remover or something. when I went rushing over to it I could see that the cells were being overcharged and yeah that thing started hissing popping and then right as I got out the door it engulfed in some bluish orange flames it was kind of scary not even going to lie.... And when they go up they go up. Anyways my man I think and this is just a suggestion you should just keep your xmax batteries at a storage charge because in the end keeping them fully charged like that is no good for the lipos and yes they might work great.... but I guarantee you the punch will be gone that you first had when you purchased the batteries.... At least I can notice this when I was first starting out and I learned my lesson.....another thing is when I was flying my heli's I could really notice this because you always wanted to try to typically get a high "c" rating lipo and man you had to really baby them things and take care of them or you were definitely suffering in the performance part of it. Also another application that really suffered if you didn't take care of lipos was when I converted my e-revo for speed and was achieving 100mph.... So yeah I mean I guess it's really irrelevant for these drones because they're never really demanding so much from the battery I think flying with the mavic air 2 demands about 6.6 amps but I guarantee you these batteries are no more than 30C so they still get warm .....still you definitely want your battery to be healthy you know what I mean? you don't want a cell to just crap out because you've been leaving it fully charged for two or three months.... Also keeping them fully charged will result in puffy lipo's I know you say you don't do it with the mavic but trust me you don't want it to happen with the drone because there's so little space when you put that battery in that compartment any little bit of puffing could result in disaster as we seen on this forum people will come back from a flight and the battery will be sticking up a few millimeters and some people don't make it through a whole flight. Not trying to lecture u or anything like that. Just trying to spread the little knowledge i have . ??