Hi , Have a J D ,S140 , 48" deck , I mow  about 2 acres   with it , Problem is  I have to recharge the battery  after  2 --2 1/2 hrs of mowing  , something  is killing the battery  which  is brand new  with the mower last season ,I ended up getting  another battery to switch out  towards the end of  each mowing so I don't have to wait on recharge ,  Mower runs fine  when  battery is full, is there a part  or fuse  that I'm missing  that keeps it charged up ? mower was new  last spring ,Thans