iPhone battery health dropped from 99% to 98% in 3 days

Hii everyone, is it normal for my iPhone battery health to drop from 99% to 98% in just 3 days? A little story time, I bought it in January and the battery health only drop from 100% to 99% this Tuesday with a total of 248 cycle count but today (Friday 4AM) it dropped to 98%. I only realized it after the 26.6 updates.

Posted on Aug 13, 2026 1:07 PM

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Posted on Aug 13, 2026 2:31 PM

Your battery is doing amazingly well. Far better than average.


With a Charge Cycle count of almost 250, your Battery Health should be at 95%. That is because the battery is expected to decline about 1% for every 50 Charge Cycles.


You have absolutely nothing to worry about. Send flowers to Apple.

3 replies

Aug 13, 2026 1:15 PM in response to klenstean

Yes it is. You are expecting even linear changes to the battery health function. It doesn’t work that way for a variety of reasons, including variances in the calculated measurements. It simply isn’t as precise as you want to make it out to be.


Whats more important is the age of the battery and the number of cycles in conjunction with the battery health. 98% for a 7 month old device isn’t at all out of line.

iPhone battery health dropped from 99% to 98% in 3 days

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