Thread: Oasis Battery Issue
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Old 07-28-2022, 06:08 PM   #3
j.p.s
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Join Date: Apr 2011
Device: pb360
Quote:
Originally Posted by Quoth View Post
Software just guesses from the voltage. On some devices the measuring software is on the cell charging control PCB.
It's more complicated than that.

The PMIC tracks a number of parameters and the calibration factors can drift out of whack over time. It can be recalibrated by letting the battery to run down somewhat low then letting it fully charge.

It can also go off in the other direction. I have seen it as high as almost 110% but the kindle will clip such readings to 100%. This leads to people reporting that charge stays at 100% for a while then starts decreasing quickly.
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