Many iPhone users are not happy when it comes to their device’s battery life. You all have notice that how quickly the iPhone drops in battery percentage from 100% to 50%, but the last one percent takes forever to drain out.
Apple Explained by Gregg Wyatt Jr. who explains that it’s actually the complexity of determining the remaining charge in the lithium-ion battery that’s causing this confusion.
Just like a gas tank that shows exactly how much fuel’s left in the car, a smartphone battery is more complex as the sensor uses voltage output or electrical pressure to denote the amount of left in the battery.
When the pressure is strong, the battery is said to be full, and as the battery gradually drains, the pressure drops with it too.
It is challenging for the device to interpret the voltage level as the actual percentage of the remaining battery as this number is influence by other kinds of variables such as outside temperature (cold temps will show better battery stamina, warm temps will drain it quicker etc.), or the health of the battery after numerous charge cycles etc.
Apple and other device makers, tweak their software, to ensure almost accurate calculations to show perfect battery readings at all times.
These algorithms tend to underestimate the amount of charge left in a battery, just to be safe, and hence it seems like the drop from say 100% to 90% happens faster than 30% to 20%.
Even if the difference between the two scenarios is 10%, the software algorithm just discover some more energy left in the end and thus it tries to offer a more accurate reading.
Our iPhone would reach 1% with a lot more battery left in it, making it last for hours until it shuts down completely which might feel like forever.
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