Hi, I had a quick search and couldn't find a straight answer. Can someone please tell me if this should actually be done (step 3)? I've seen comments where people say it's unnecessary, could it at all be detrimental, or do they mean unnecessary as in simply a waste of tine? Also, to do it fully, am I supposed to fly it until around say 5% or is it meaning use it as a USB power bank until the battery turns off as a 0%? Thanks in advance.