What 'mAh' means for your phone's battery, and why I focus on another metric instead

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After the camera, display, and latest AI-powered features, perhaps the most important features on a new phone is the battery. Each year, manufacturers boast longer battery life and more capacity. lMeasured in mAh, a phone's battery is an important factor for many buyers.

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While it might be enticing to splurge for a phone with a huge battery, a large mAh doesn't necessarily guarantee you'll be happy with the results. So what is mAh, why does it matter, and why do today's phones with over 6,000 mAh struggle to last all day when your old phone with 4,000 mAh lasted way longer?

Without getting too technical, mAh stands for milliampere-hours, or how many milliamps of current a battery can provide for one hour. The bigger the battery, the larger the mAh number, and the more power the battery can hold before it needs recharging.

Today's phones have bigger capacities than ever, but they're also doing more than ever. The power required to keep modern smartphones going is worlds higher than phones from years ago. 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.

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Your device's processor, the display, any software optimization like battery saver, what programs you have running, your phone's refresh rate, the battery's age, and even the temperature all impact how quickly your phone consumes available battery.

Battery capacity is one case where the endless Android vs. Apple battle truly matters. You'll almost always see smaller battery capacities on iPhones, yet they function the same as larger capacity Android counterparts. For comparison, Apple maxes out at just under 5,000 mAg while Android phones can reach 6,000 at present.

In 2026, right around 5,000 mAh is the Android standard. Just a few years ago, this was the ceiling for batteries, but now it's the norm. Most modern smartphones consume about 500 mAh per hour , so a 5,000 mAh battery gets you approximately 10 hours of use.

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