Mi macbook pro mid 2012 se apaga cuando desenchufo el cargador

¿Qué debo hacer ahora? ¿Qué debo hacer ahora?

Battery Information:

  Model Information:
  Manufacturer: SMP
  Device Name:  bq20z451
  Pack Lot Code:    0
  PCB Lot Code: 0
  Firmware Version: 201
  Hardware Revision:    000a
  Cell Revision:    165
  Charge Information:
  Charge Remaining (mAh):   4042
  Fully Charged:    Yes
  Charging: No
  Full Charge Capacity (mAh):   4226
  Health Information:
  Cycle Count:  1050
  Condition:    Replace Now
  Battery Installed:    Yes
  Amperage (mA):    0
  Voltage (mV): 12304