Apple today released macOS Catalina 10.15.5, the fifth update to the macOS Catalina operating system that was released in October 2019. macOS Catalina 10.15.5 comes two months after the launch of macOS Catalina 10.15.4, which introduced Screen Time Communication Limits.
macOS Catalina 10.15.5 is a free update that can be downloaded from the Mac App Store using the Update feature in the System Preferences app.
The macOS Catalina 10.15.5 update introduces a new Battery Health Management feature for Mac notebooks. Battery Health Management is meant to extend the overall lifespan of a Mac’s battery by reducing the rate of chemical aging.
Battery Health Management analyzes the battery health of a laptop and its charging pattern, and in some cases, it will preserve battery longevity and health by not charging a MacBook to its full capacity. Keeping a MacBook charged at its full capacity at all times can reduce battery health.
Read more at MacRumors.com