title_body: Why does motor not want to go above 2/3 thrust? This is related to my past ESC troubles. See link for some flight history.
  I tried the recalibration as suggested by ifconfig, which sadly didn't work. But now the motor will not go above 2/3rds thrust(slight improvement), no matter the calibration range. I did do one calibration where I used full throttle as max and the center as none, and the ESC would stop working once I got above 2/3rds of the calibration range.
  What it is not;
  
  ESC overheating/overloading(it is cool to the touch and I even ran it in our deep freezer, same results)
  broken ESC(I used a new ESC as well as an old one I fixed. Both have the same problem)
  
  What I'm not sure about;
  
  the receiver has been in some crashes, perhaps it got shaken around and is messing with the signals?
  the transmitter is cheap so it might be messed up, but it was working fine before.
  motor might be broken but I don't think so, it's not even scratched up.
  battery(charger) might be to blame. The charger I have (also cheap) has 3 lights for the cells, and the cell 1 light never turns green(ive left it charging overnight, still red). I just thought the charger was broken, but maybe cell 1 isn't getting charged?
  
  hardware specs;
  
  ESC is rated for 30A, uses T-plug to connect to battery.
  Battery is a 3S 2200 mah 30C from Mirahobby
  Motor is 2200 kv, is using a 9050 prop(slightly outside plane and motor recommendations)
  Plane is an FT Spitfire from flitetest
  The only modifications I have made to any of these pieces is when I globbed some hot glue onto the antennae on the receiver to strengthen it some
  
  What do I need to fix to get the motor/esc to work properly? Do I need to replace any of my hardware? Should I just build a lighter plane that only needs 2/3 thrust?
upvoted_answer: It was the battery.
  Bought a new battery, charged it, all 3 lights turned green, and motor/esc has no trouble going to full thrust. Lots of power now, so that should really help the plane fly.
  Problem solved!
  And on the bright side, I get to tear apart the broken 3s battery and see how to fix it or turn it into a 2s. I'll probably put a question on electrical engineering SE about that later.