# mAh
> mAh is a battery capacity rating that hints at how much charge a device can store.
Topics: Power & batteries
Difficulty: Everyday
Aliases: milliamp hours, battery capacity
Updated: 2026-06-26T08:00:00.000Z
## In one analogy

Think of it like the size of a fuel tank, not the whole story of fuel economy.

## Go deeper
mAh is a battery capacity rating that hints at how much charge a device can store. In everyday buying decisions, the useful question is not just what the spec says, but what it changes for comfort, cost, speed, safety, or battery life.