Batteries have improved a lot since 2000, compare a Nokia 8300 from 2001. Which has a 750 mAh battery. To a new iPhone 12 with a 2,815 mAh. Almost 4 times larger battery.
But we also got a lot of new battery draining features, larger color screen, touch screen, camera, Bluetooth, faster processor, etc. Hardware features are growing faster than battery technology.
https://en.m.wikipedia.org/wiki/Nokia_8310
https://en.m.wikipedia.org/wiki/IPhone_12
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