Your MacBook’s performance is optimized when connected to AC power, utilizing the full power adapter output and drawing extra power from the battery for demanding tasks. This can sometimes lead to a decrease in battery charge even while plugged in. Conversely, relying solely on battery power limits performance, especially for intensive tasks. While this might be unnoticeable for light workloads, consistently using AC power is recommended whenever possible.
Your Mac employs three micro-controllers to manage battery and charging, ensuring the battery never overcharges. A charge cycle slightly impacts battery lifespan. Without Battery Health Management enabled, your Mac typically recharges when the battery level drops to around 92%, topping it off to approximately 99%.
For MacBooks Pro with a T2 chip (2016 and later) running Catalina 10.15.5 or newer, Battery Health Management optimizes charging based on your usage habits. This feature adjusts the charging thresholds, starting a charge cycle at a lower battery percentage and potentially stopping before reaching a full 99% charge. This adjustment aims to prolong the overall lifespan of your battery. Consequently, you might notice your Battery Not Charging to 100% when this feature is active.
Apple’s Battery Health Management dynamically adjusts these charging parameters, delaying charging cycles to minimize battery wear. While it may seem like your battery is not charging as expected, this intelligent system prioritizes long-term battery health.
This feature is designed to learn your charging routines and adapt accordingly. For instance, if you consistently connect your MacBook to power at the same time each day, Battery Health Management will delay charging until just before you typically unplug, reducing unnecessary charging cycles.
Understanding these power management features can help alleviate concerns about a seemingly malfunctioning battery. While a battery not charging to full capacity might appear concerning, it often indicates that Battery Health Management is actively working to extend your battery’s lifespan. If you suspect a more serious issue, consulting Apple Support or an authorized service provider is recommended.
