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Under the Hardware section of the System Information window, select Power. The current cycle count is listed under the Battery Information section.Hold the Option key and click the Apple menu , then choose System Information.Your battery is designed to retain up to 80% of its original charge capacity at its maximum cycle count. For best performance, replace your battery when you reach its maximum cycle count.įollow these steps to access information about your Mac notebook battery, including its cycle count: Knowing how many charge cycles your battery has and how many are left can help you determine when a battery replacement is required. In this example, it might take several days to complete a cycle.īatteries have a limited amount of charge cycles before their performance is expected to diminish. Once the cycle count is reached, a replacement battery is recommended to maintain performance. You can use your battery after it reaches its maximum cycle count, but you might notice a reduction in your battery life. : A1331 Battery for A1331 A1342 Apple MacBook Unibody 13 Inch (Late 20) Fits 661-5391 661-5585 MC207LL/A MC516LL/A 10.95V 63. apple site recommends calibrating the first time usage. If you did the same thing the next day, it would count as one charge cycle, not two. Macbook pro :: calibrate your battery the first use is, Macbook pro :: calibrate your battery the first use is necessary apr 15, 2010. A charge cycle happens when you use all of the battery’s power-but that doesn’t necessarily mean in a single charge.įor example, you could use half of your notebook's charge in one day, and then recharge it fully. When you use your Mac notebook, its battery goes through charge cycles.