Why is my MacBook Pro showing the low battery screen while at 100%? Yesterday my MacBook shut down, a few seconds after I turned it on, and showed this screen when I wanted to turn it on again:



When I plugged in my Mac, the battery level was at 100%!

The same scenario happened today when I turned on my Mac, it was showing around 20% battery left and a few seconds after I logged in, it shut down and was showing the same low battery screen.

I have a MacBook Pro mid-2015 with macOS Sierra.



Here is some information about the battery (while Mac charging):

  Informations sur la charge :
      Charge restante (mAh) :             3113
      Charge complète :                   Non
      En cours de chargement :            Oui
      Capacité de charge complète (mAh) : 7496
  Informations sur la santé :
      Comptage de cycles : 451
      Conditions :         Normal
  Batterie installée :        Oui
  Intensité de courant (mA) : 4590
  Tension (mV) :              12269


Has anyone ever experienced this?
Your battery is failing; it's not holding a charge  It's time to have it replaced.

The symptoms you've described is indicative of  one or more failed cells.  Your battery is going to "report" back to the SMC that it has:


7496 milliampe hours at full charge
3113 milliampe hours remaining (calculated value)
451 charge cycles
it's putting out approximately 12.3 volts (measured value)


As much as it can measure at a single point in time, it cannot "look into" the battery to see if there's capacity to hold a charge - in other words, there's no "dipstick" to measure capacity within the cells themselves.

When there's a bad cell, your charge will go from "good" to "bad" with no warning (i.e. 20% to nothing) because it cannot account for the missing capacity.

Also, given the age of the MacBook (3+ years) it's well within it's lifespan of 3 to 5 years.