Why is it that the first 10-20% of most IPhone battery’s are used up within the first 20-30 minutes while the last percent can sometimes last up to 15-20 minutes?

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Why is it that the first 10-20% of most IPhone battery’s are used up within the first 20-30 minutes while the last percent can sometimes last up to 15-20 minutes?

In: Technology

2 Answers

Anonymous 0 Comments

A battery is more or less fancy a capacitor. They don’t (dis)charge linearly but geometrical or exponentially (can’t remember). This is the reason why some devices can ‘quick charge’ for 15 minutes to get to 70-80% but take an hour to reach 100%.

Fun fact, capacitors can actually never charge to 100%. If you looked at a graph of charge over time the graph flattens out and approaches 100% but only reaches it after an infinite amount of time.

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