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The controversy first emerged in late-2016, when it was reported that since a recent iOS update, some iPhone handsets had begun to experience unexpected shutdowns when their battery capacity reached 30%, caused by drops in the battery's terminal voltage below a threshold of around three volts required for operation of the device. [4]
How fast self-discharge in a battery occurs is dependent on the type of battery, state of charge, charging current, ambient temperature and other factors. [2] Primary batteries are not designed for recharging between manufacturing and use, and thus to be practical they must have much lower self-discharge rates than older types of secondary cells.
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The second-generation iPhone SE (also known as the iPhone SE 2 or the iPhone SE 2020) is a smartphone developed and marketed by Apple Inc. It is part of the 13th generation of the iPhone, alongside the iPhone 11 and 11 Pro/Pro Max models. Apple announced it on April 15, 2020, coinciding with the discontinuation of the iPhone 8 and 8 Plus.
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The third-generation iPhone SE has a similar design to the iPhone 8 and similar internal hardware components to the iPhone 13 series, including the A15 Bionic system-on-chip [10] and 5G connectivity. The third-generation iPhone SE is the last iPhone to feature 4 GB of RAM, as well as 64 GB of internal storage, and single lens rear camera.
The iPhone 13 and iPhone 13 Mini (stylized as iPhone 13 mini) are smartphones developed and marketed by Apple. They are the fifteenth generation of iPhones , succeeding the iPhone 12 and 12 Mini . They were unveiled at an Apple Event in Apple Park in Cupertino , California, on September 14, 2021, alongside the higher-priced iPhone 13 Pro and ...
The fine-grain structure also provided better anti-corrosion properties and enhanced battery performance in a 4 mol/L NaOH solution. At a current density of 10 mA/cm², the fine-grain anode showed a 41.5% increase in capacity density and a 55.5% increase in energy density compared to the coarse-grain anode.