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Originally Posted by StoryEnthusiast
I think I've read it somewhere that Lithium Ion has this 'memory" effect where repeated charging while there is still battery power will reduce the total battery power over time. Can someone confirm it?
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I think what you mean is a sort of calibration within the device's battery percentage counter. It usually bases its prediction of battery percentage based on a few good full drain and full charge cycles. If it notices that you charge your phone way too much at say for example, 40%, it will think that at 40%, your battery is already drained and will then adjust the calibration to show that when your battery is nearing 40%, it will display near 0%. This will make you perceive that the battery is running out too quickly.