The Hidden Setting That Can Help Your Old MacBook's Battery Health Last Longer

The lithium-ion batteries in high-end laptops and smartphones won't maintain their quality and capacity forever. This kind of battery technology is degradable. Therefore, many brands have included ways to maximize battery life using clever software tricks. One such trick is a feature Apple calls Battery health management, available on older, Intel-based MacBooks. So unless you want to try to restore your battery by giving it an electrochemical bath, read on.

The concept is simple: Apple will use software to lower the total maximum capacity of an aging battery over time to make sure it maintains performance and reliability. This feature is only available on Intel-based Macs, since these older Macs' battery management is less predictable than it is on Apple silicon Macs. It is important to note that Apple offers Optimized charging on Apple silicon Macs and other Apple devices to help get ahead of this. But the more aggressive Battery health management feature is a great option if you want to keep your older Intel MacBook running just a bit longer — even if the software you use on them may not last into the next OS generation.

The Battery health management feature, according to Apple, uses a variety of measurements such as temperature, charge cycles, and discharge rates to determine how healthy or efficient that battery is. A lithium-ion battery isn't a permanent item, and charging it full-bore, letting it get hot, or charging it through too many partial cycles can all have an effect on its efficiency as it ages. This feature from Apple aims to fix that.

Once the Battery health management feature in macOS understands a specific battery's shortcomings and weak spots, it'll take some steps to change how it charges the battery moving forward. By possibly lowering the overall capacity or the speed with which the battery charges, Apple's software can help to stave off some of the overheating and overcharging artifacts that got the battery to its suboptimal place.

This isn't a uniquely Apple approach (or even unique to Intel Macs). While this specific feature is only available for certain Intel Macs, current-generation Apple silicon devices offer a simpler Optimize charging feature that will do some of this safety work earlier on in the battery's lifecycle. Android phones and PCs also have similar features where they limit charging capacity to prevent over-pressuring these sensitive components. Of course, you should always make sure you're using the approved chargers with your devices.