My boss' 4s had 86% capacity after many years and 1200?+ cycles. I do not see a problem with a phone having a 95% capacity after 1000 cycles. I believe Apple got a batch of bad batteries that had difficulty maintaining their voltage as the phones aged hence their willingness to do cheap battery replacements to help satisfy these unhappy customers. This is the same thing my wife's 6s+ did (voltage drop). The fact that your phone's performance management was enabled means the battery dipped below acceptable voltage.
BATTERY HEALTH VS. BATTERY HEALTH 2 FULL
On an older battery, this capacity difference will widen significantly, especially if a reading is taken further away from a full charge.Īpple's health meter is definitely pre-programmed to take a different approach to reading battery capacity. I've seen a 3-6% capacity difference when reading below a full charge, even more at a 20-40% charge. For consistency I only read at full charge. Battery capacity can vary depending on when you do the reading. Getting an accurate reading on them is difficult, especially over time. Later on, during the battery fiasco that spawned the Battery Health reader in iOS, Apple refunded us $50 without us having to do anything.īatteries are a chemistry. In so doing, they destroyed my wife's 6s+ and we got a new 6s+.
They shrugged their shoulders and had to be forced to let me pay them for a new battery out of pocket. We showed them how it shut off below 70% with any load. Of course, when we took it into Apple, they showed "green" and healthy. coconutBattery showed her battery capacity randomly fluctuating between 40%, 60%, and 90%. Less than 6 months into ownership, her phone would randomly shut off and last easily half as long as my identical phone. My wife's 6s+ was the only anomaly in our lineup of phones from the 6+ to the Xs MAX. Most of my other phones strayed a percentage or two (6+ and 8+) - this includes iPads. The worst was my 6+ that went from 108% from design capacity to 98% after almost 2 years. I'm a light user and my wife is a heavy user of her phone.Īfter 2 years and 230 - 300 cycles my phones have had little to no battery degradation in terms of overall capacity. My wife gets the same phone I do so I have 2 phones to "observe" and compare against with very different usage. I usually keep my phones for 1.5-2 years.
I take weekly readings and focus on the battery capacity vs design capacity. I have watched all of my devices with coconutBattery since the 6+, to the 6s+, to the 8+, and now Xs MAX. As a self prescribed battery hobbyist, I must admit I'm not entirely sure what is going on.
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