My battery charges to 4 bars, and all 4 dots are green  while charged, but they stay on..
sometimes it turns off by itself.. sometimes, the four dots stay on..

is there something wrong with my battery?

I've tried flying it down to 60% and charge again- and it would turn off by itself when full. and then after i guess a few flights, this shows up again.- the four lights stay on.
but I haven't had any issues with the battery in terms of flying...

and after the 4 lights are on, i can unplug and start mavic and it would show 100% charged.. so... I guess it's okay... just worried of over charging...

Read this https://forum.dji.com/forum.php?mod=viewthread&tid=84995&page=3&mobile=2#pid698476

Feel the battery after the charging if it is not EXTREMELY hot than you are OK.

I might not update. As right now, I do not have any issues.
Except, I cannot access WIFI mode.. but I don't think I will use WIFI mode unless under special circumstances..