Battery Life. How many counts are good?

Battery life is estimated at 1000 cycles. 1 cycle is 100% battery used, so 2 times using battery to 50% then full-charge will equal 1 cycle.

1139 cycles is better than average. Just have Apple swap it. Warning ... though not necessarily happening ... old batteries can swell and disturb keyboards, disturb trackpads, leak chemicals. Unlikely it will swell but do not delay too long.

Cell revision is the revision number of the design of the cells used in your battery. Your battery is using cell revision number 164. The complete specification of the cells used in that battery, down to the tiniest detail, are on a drawing somewhere inside Apple with the title Cell revision #164. From that drawing, one could build an exact replica of a battery cell revision #164.

The next change they make after that design, whether it is in chemistry, packaging, contacts, or labeling, and whether it gets into production or not, will be cell revision 165.

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Apple defines the end-of-useful-life if of your battery as the point when it can only maintain 80 percent of its original powering ability. In some batteries, that may happen at 300 cycles. In others, at 2000 cycles. They expect that number to average around 1000 cycles.

If your battery only lasts for 80 percent of the time it used to, you should think about getting a new one soon.

Your battery has had a long life.... it needs to be replaced

I just meant Apple estimates the reasonable life at 1000 cycles. Sometimes you get more, occasionally less. You got more. 🙂

Do not know. I only ever worried about current max charge level and cycle counts.