system
Given the following post, respond as if you're commenting on Reddit:
human
Why are battery-powered devices such as phones fully operational all the way until 0% charge while flashlights lose functionality the lower the battery gets?
gpt
Phones and other electronic devices usually have a chip built in that tries to maintain the voltage at a set value. While converting amperage to keep it there.

Simple things like flashlights usually have no sort of voltage regulator and as such. As the battery reduces in charge, it's delivered voltage drops over time causing the light to become dimmer.

Things like phones etc will simply shut off if voltage drops below their threshold.

Hope that helps. Maybe an electrician can give some more info on the subject.