Quote:
Originally Posted by sclitheroe
Fourth post - Calibration.
The capacity shown on your devices is an estimate of available capacity, not the gospel truth. The charging circuitry knows what a full charge voltage is, and what a terminal voltage is, as well as the approximate voltage discharge curve of a lithium ion battery. It also knows how much current it put into the device and how much current has been taken out of the cells.
We've already said that its harmful to discharge a lithium ion battery all the way to zero, but sometimes you will want to. If you notice that the indicated battery capacity is grossly wrong, you'll want to run the device until it shuts down, and then allow it to fully recharge in one go. This will allow the monitoring hardware to reset it's knowledge about how much charge can be stuffed into the battery at its current health state.
Don't do this weekly. Don't do this monthly. Do this if you feel there are significant misrepresentations about battery capacity. Every time you do this, you are inflicting a fair degree of wear on the battery.
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How do the various battery apps work, as far as battery details are concerned? Most of them seem to claim an accurate representation of battery charge (to a singular percentage point), temperature, remaining charge time, etc. Some of them also claim to alter the charge cycle so as to maximize battery life/efficiency, of which I'm skeptical.