ZDNET's key takeawaysYour phone's battery is measured in mAh, or milliampere-hours. In 2026, the standard for most phones is 5,000 mAh. lMeasured in mAh, a phone's battery is an important factor for many buyers. So, how much your phone's battery holds isn't the only factor in how long that battery will last, as a phone with a bigger battery often comes with processes and features that drain that battery more quickly. Most modern smartphones consume about 500 mAh per hour, so a 5,000 mAh battery gets you approximately 10 hours of use.