Hi Wonder.

Well, the manufacturer recommends charging these as you would any Lithium pack. I guess that means removing them. They also recommend doing a balance charge. So, again, that means removing them.

The nice thing about high-capacity packs like this, though, is that you can pretty much fly all day and not worry about taking the plane apart to charge them at the field and save the battery pack for removal at home.

That's neither an endorcement nor a recommendation (legalese for do what you need to do, just don't blame me if your house burns down sort of thing... )

CGr