Why iPhone Battery Drops From 100 To 90% Faster Than The Last 1 Percent

Most iPhone users aren¡¯t the most content when it comes to their device¡¯s battery life.

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Also Read: Is Apple's iPhone Battery Health Indicator A Sham? YouTubers Claim It's Pointless

However, one thing we all have noticed is how quickly the device drops in battery percentage from 100 to 50 percent, but the last one percent takes forever to drain out.

Browsing on YouTube today, I stumbled upon one video by a channel dubbed ¡®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.

Unlike a gas tank that shows exactly how much fuel¡¯s left in the car, a smartphone battery is more complex -- the sensor uses voltage output or electrical pressure to denote the amount of juice 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 influenced 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.

To overcome these variables, Apple and other device makers, tweak their software, to ensure almost accurate calculations to show perfect battery readings at all times.

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And normally, 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 percent. Even if the difference between the two scenarios is 10 percent, the software algorithm just discovered some more energy left in the end and thus it tries to offer a more accurate reading.

Also Read: Apple Is Lying To You About How Long Your iPhone Battery Really Lasts, Claims New UK Study

And thus, following the same strategy, at times, our iPhone would reach one percent with a lot more juice left in it, making it last for hours until it shuts down completely -- which might feel like forever, but hey, we¡¯re not complaining!

Have you experienced something similar with your iPhone or Android device? Tell us in the comments below and keep reading Indiatimes.com for the latest science and technology news.