![]() Load: The amount of activity being performed by a task or tasks.Defective batteries are covered under Apple's one-year limited warranty and extended-service contracts. Defective: Batteries are considered defective when they stop working due to a defect in materials or workmanship, or due to a manufacturing defect.Using the computer when not connected to AC power will cause this number to lower as power is depleted from the battery. Remaining charge capacity: This number represents the current amount of power left in the battery as measured in mAh (milliampere-hours). ![]() Full charge capacity: Measured in mAH (milliampere-hours), this refers to the amount of power the battery is capable of containing, less the energy required to shut down the device. This number lowers as the battery becomes depleted with usage and age.You can see the cycle count limit for your computer by reviewing Determine battery cycle count for Mac notebooks. This number represents the sum of total and partial discharge cycles throughout the life of the battery. Cycle count: Batteries are expected to function for a certain number of cycles.To understand battery technology and battery life, it's good to know common battery terminology: MacBook, MacBook Air, and MacBook Pro computers come with lithium polymer batteries to provide maximum battery life in a compact space. It's best to rely on the information reported in the battery health menu, described above. While some third-party apps report on battery health conditions, the data reported by these apps might be inaccurate and isn't a conclusive indication of actual diminished system run time. ![]() If the battery's lowered charging capacity is affecting your experience, get your battery evaluated at an Apple Store or Apple Authorized Service Provider. In earlier versions of macOS, the battery status might display Replace Soon, Replace Now, or Service Battery if your battery holds less of a charge than when it was new or needs to be serviced. To get service on your battery, contact Apple.
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