# How Do Fast Chargers Know How Much Power To Deliver To Your Device?

> A study on mobile phone usage in the U. S. showed that Americans use their phones for an average of 5 hours and 16 minutes per day (via Harmony Healthcare IT).

- **Source:** [SlashGear](https://www.slashgear.com/1901703/how-fast-charger-know-how-much-power-deliver-to-device/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=686a1a79c9d2986e1bb16a4e)
- **Published:** 2025-07-06
- **Category:** Phones
- **Tags:** #battery #chargers #deliver #device #fast #power #americans #average
- **Canonical:** http://localhost:4321/a/686a1a79c9d2986e1bb16a4e

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._