I just bought a P4P used with only an hour flight time. I get it and when I open it to inspect I see this in one if the batteries and on the inside if the bird where the battery sits.
It doesn't rub off and by the marks it seems like some kund if mini explosion. Has any9ne seen this before?
It doesn't rub off and by the marks it seems like some kund if mini explosion. Has any9ne seen this before?