Fix ‘Inaccurate Battery Percentage on Mac’ Issue – Guide
All Macs with internal batteries have an indicator that appears in the menu bar. In rare cases, the indicator may not show the correct battery level. A battery that displays the wrong percentage in the menu bar will show a percentage higher or lower than it actually shows. If this happens, you will receive a low battery warning sooner than expected and you may need to connect your computer to an AC adapter more often than necessary. Pay attention to these signs, as the battery percentage may no longer be accurate. To fix this problem, you first need to know what may be causing it. This kind of thing doesn’t happen very often, so it can be difficult to diagnose. On the other hand, 9 times out of 10, the problem with your Mac not registering the correct battery level is a software problem and not a hardware problem.
Resetting the system management controller (SMC)
The System Management Controller, or SMC, on your Mac, is built into the operating system and groups several functions that involve the screen, battery power, startup, shutdown, hibernation and more. If something gets out of tune with the battery indicator, resetting the SMC can update the battery percentage so that it is accurate again. How to resetting the SMC depends on the type of Mac you have. If you have an older Mac notebook with a removable battery, the first thing you should do is turn off your computer and disconnect it from the power supply. Remove the battery. Then press and hold the button button for five seconds while the battery is still out of the machine. Insert the battery again, connect the laptop to a power source and plug it in again. If you have a newer MacBook model without a removable battery, the procedure is slightly different. Turn off the computer, but connect it to a power source while it is turned off. Press the Shift, Control, Option and on / off keys at the same time – the first three should be the keys on the left side of the keyboard. Monitor closely the percentage of the battery your Mac displays in relation to its use in the next two days and see if restarting the SMC fixed the problem.
Calibrate your Mac’s battery
Keeping the battery calibrated is not only important for the percentage of the battery on your Mac to remain accurate, but it is vital for optimal battery health over the years and charge cycles. Battery calibration is easier than you think. You should basically use the computer as you normally do, except to let the battery show its full power. First, connect your Mac to a power source and charge it to its full capacity, 100 percent. Once fully charged, leave it connected for about two hours so that it is 100 percent charged. Disconnect the Mac and start using it, letting the battery run down naturally. Eventually, the battery will run low, so let it drain until the computer automatically enters standby mode. After it has been hibernating for a few minutes, connect the charging cable to your MacBook and recharge your computer 100 percent. This entire cycle is what calibrates the battery. Once the MacBook is recharged again, disconnect the charging cable and observe, as you use the machine, whether the battery percentage appears to be more in sync with its use.
Schedule an appointment at the Genius Bar
When all else fails, turn your battery into someone else’s problem! The geniuses behind Genius Bar at your local Apple store are likely to be able to fix the battery accuracy problem very quickly. They will probably take care of this using either method, depending on the cause. The first solution is to replace the battery. This is covered if you are under warranty, including the one-year limited warranty if it is a manufacturer’s defect. Otherwise, prices vary depending on the MacBook model. Costing $ 129 are replacement batteries for any MacBook Air, the 13-inch MacBook and the 13-inch and 15-inch non-retina MacBook Pros. $ 179 replaces the battery in the 17-inch MacBook Pro and $ 199 covers the 12-inch MacBook and the 13-inch and 15-inch Retina MacBook Pros. These prices include the battery itself and the repair service, meaning Apple Geniuses recycle the old battery and install the new one for you. If you don’t need to replace the battery, Geniuses still has tools available to run tests on your MacBook and diagnose any problems, so it might still be worth a visit to the Apple Store. The cost to correct any diagnosed problem will be different based on the cause and the procedure.
Final note
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