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. The devices launch this Friday.I don't think either are lying. Apple says all of the iPhone 15 models have the same battery life as their iPhone 14 predecessors. Yesterday, it emerged that all of the iPhone 15 and iPhone 15 Pro models feature a new battery health setting that prevents the devices from charging beyond 80% at all times when enabled. With lithium-ion batteries, the capacity diminishes slightly with each complete charge cycle. The capacity of any type of battery will diminish after a certain amount of recharging. It could take several days to complete a cycle. ![]() If you use 25% the next day, you will have discharged a total of 100%, and the two days will add up to one charge cycle. For instance, you might use 75% of your battery's capacity one day, then recharge it fully overnight. You complete one charge cycle when you've used (discharged) an amount that equals 100% of your battery's capacity - but not necessarily all from one charge. From Apple's battery information webpage:Īpple lithium-ion batteries work in charge cycles. Battery cycle information can easily be accessed on MacBooks by navigating to System Information. A charge cycle is registered every time you deplete all of the battery's capacity. While battery health has been visible on the iPhone for several years in the form of "Maximum Capacity," the ability to see its specific number of cycles is a valuable additional metric to determine its condition. Can confirm iPhone 15s now show battery cycle count in Settings > General > About /G0bOsYYCx4
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