The life of a MacBook battery is limited. You know it has come to an end when the battery doesn’t last as long as it used to, the Mac shuts down when there’s still a charge, or you got an alert from CleanMyMac 3. The battery can die on you any day now, so make sure you replace it in the nearest future. For more information on replacing your battery, check out Apple's Battery Service and Recycling.
Why is my battery failing?
The life of a battery is measured in charge cycles. If your battery’s failing, it doesn’t have any left. Some MacBook batteries have lifetimes of 300 cycles, some have 500 and even 1000. One charge cycle is when the battery uses all of its charge capacity. It doesn’t necessarily equal one charge, though: you can drain half of your battery one day, fully recharge it, and then do the same thing the next day — that will be approximately one cycle.
The way you use your battery determines how soon these charge cycles get exhausted and influences battery health. Here’s what can cause a MacBook battery to fail sooner.
Wearing the battery out.
When you constantly use your Mac at maximum brightness, with Bluetooth turned on and unused apps running in the background, the battery loses charge faster and, therefore, runs out of charge cycles sooner.
Storing your Mac fully charged.
According to Apple, the battery might lose some of its capacity if you store it fully charged for a long time. When you’re not planning on using your Mac for a while, charge it to 50% and leave it be.
Regularly draining the battery into low percentages.
Just like you shouldn’t keep your Mac fully charged, you shouldn’t fully deplete the battery either. Constantly draining it into low percentages can eventually damage your battery.
Can CleanMyMac 3 fix battery issues?
Most likely, you’ll have to replace the battery that’s failing. But after you do, CleanMyMac will keep an eye on your new battery and help it live longer. Make sure you do the following to take better care of the new battery.
- Disable login items with the Extensions module. That way, unnecessary apps won’t launch when you log in and waste the charge.
- Disable unnecessary launch agents and extensions (these are managed with the Extensions module, too). The more stuff you have running, the faster your battery loses charge.
- Keep an eye on battery health and the charge cycles used in CleanMyMac’s Dashboard. This will help you spot battery issues as soon as they arise.
If you’re still using the trial version of CleanMyMac 3, you can buy the full version to use all modules and features without limitations.
Also, there’s more info on CleanMyMac’s health and monitoring here.