Quick answer
Fast battery drain on a MacBook is most often caused by energy-hungry apps, background processes, inappropriate settings, or a weakened battery. Check the energy consumers list in Activity Monitor, turn off unnecessary features, and check battery health. If the problem persists, contact a service center.
How to recognize the problem
- Battery drains significantly faster than before with the same usage
- MacBook gets hot and the fan is loud even when not doing anything demanding
- Estimated battery life drops suddenly during the day
- Battery charges slowly or the percentage drops quickly
- Battery service warning in System Settings
Most common causes
Energy-hungry apps
Browsers with many open tabs, video calls, games, and media processing apps can significantly increase consumption. They often run in the background even when you think they are not active.
Background processes and indexing
Spotlight indexing, iCloud sync, Time Machine backup, and system updates can temporarily load the processor and battery. These processes usually stop on their own.
Inappropriate settings
High screen brightness, disabled automatic brightness adjustment, Bluetooth or Wi-Fi always on, and unnecessary background apps consume energy.
Weakened or damaged battery
Batteries lose capacity over time. If the charge cycle count is high or the system reports service, the battery may not last long.
System issues or malware
Rare but possible: macOS issues or malicious software can cause abnormal consumption. Checking activity and scanning help.
Step-by-step fix
- 1
Check energy consumers in Activity Monitor
Open
Activity Monitor(in Applications > Utilities). Click theEnergytab and sort by theEnergy Impactcolumn. Pay attention to apps with high values. If an app consumes too much, close it or update it. - 2
Close unnecessary apps and tabs
Close apps you are not using, especially browsers with many tabs. In Chrome or Safari, close tabs you do not need. This will free up memory and reduce consumption.
- 3
Check battery health
Open
System Settings>Battery>Battery Health. CheckMaximum Capacityand whether it saysService Recommended. If capacity is below 80% or there is a service recommendation, the battery should be replaced. - 4
Adjust settings for energy saving
In
System Settings>Battery, enableLow Power Modeas needed. Reduce screen brightness, turn off Bluetooth and Wi-Fi when not needed. InSystem Settings>Displays, enable automatic brightness adjustment. - 5
Disable unnecessary background processes
In
System Settings>General>Login Items, remove apps that start automatically. Also checkSystem Settings>Privacy & Security>Location Servicesand turn off location for apps that do not require it. - 6
Update macOS and apps
Open
System Settings>General>Software Updateand install available updates. Also update apps via the App Store or directly. Updates often include fixes for energy consumption. - 7
Reset SMC (if applicable)
On MacBooks with Apple Silicon chips, SMC reset is not needed. On older Intel models with T2 chip, shut down the Mac, hold
Control+Option+Shift(left) and the power button for 7 seconds, then release and wait a few seconds before turning on. For models without T2, consult Apple instructions. - 8
Check for malware
Download a free checking tool such as
Malwarebytesfrom the official website and run a scan. Pay attention to unknown apps inApplicationsand remove those you are sure you did not install.
If nothing helps
If you have gone through all the steps and the battery still drains fast, the problem may be hardware-related. Check if the MacBook is under warranty or AppleCare. Contact an authorized service center for diagnostics. In the meantime, you can use the MacBook plugged in with Low Power Mode enabled to extend runtime. Also, consider replacing the battery if health is below 80%. Do not attempt to replace the battery yourself as this can damage the device and void the warranty.
How to prevent it
- Regularly update macOS and apps
- Turn off unnecessary background apps and features
- Use Low Power Mode when on battery
- Check Battery Health every few months
When to call a professional
If the battery drains fast even after all steps, or if you notice swelling, leakage, or extreme heating, contact IT support or an authorized service center. Do not risk it yourself.
IT infrastructure maintenance · Servers, networks, backup, security and helpdeskFAQ
How long should a MacBook battery last?
New MacBooks typically last 8-12 hours depending on the model and usage. If it lasts significantly shorter, check battery health and energy consumers.
Is it normal for the battery to drain faster when the MacBook is hot?
Yes, high temperatures can accelerate drain and permanently damage the battery. Check if the ventilation openings are clean (if the model has them) and if the MacBook is on a hard surface.
How do I know if the battery is weakened?
Open `System Settings` > `Battery` > `Battery Health`. If `Maximum Capacity` is below 80% or it says `Service Recommended`, the battery is weakened and should be replaced.