system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do phones charge faster from a lower percentage compared to nearly full?

It seems to take a much shorter amount of time to charge between 30% to 40% for instance, compared to 90% to 100%
gpt
The stadium effect is in effect here. Imagine an empty baseball stadium that holds 60,000 people and outside are 60,000 fans waiting to get in. Those people are the electrons looking for a seat in the battery. The first people can sit anywhere they want as fast as they want. As more people enter it becomes harder to find a seat. Thus, they have to walk around for a bit until they can grab an empty seat.