Battery capacity in milliampere-hours (mAh) measures how much electrical charge a battery holds. A higher mAh rating generally means longer battery life, though real-world endurance depends on many factors.
Milliampere-hours (mAh) describes the total energy a battery can store. A 5000mAh battery can theoretically deliver 5000mA of current for one hour, or 500mA for ten hours.
However, mAh alone does not determine real-world battery life. Screen size and resolution, processor efficiency, software optimization, and network usage all play significant roles.
Typical mAh ranges by device type in 2026: smartphones average 4000 to 6000 mAh, tablets range from 7000 to 12000 mAh, and laptops are measured in watt-hours (typically 40 to 100Wh).
When comparing phones, a 500mAh difference rarely translates to a meaningful real-world difference. Focus on battery life hours reported in reviews over raw mAh numbers.