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My Macbook Pro (Mid 2012, OSX 10.10.2) sometimes gives the Low Battery warning, then immediately after dismissing the notification the battery pops back up to about 25% battery, still showing a red battery icon.
It is above 20% but is still red.
What could have caused this, is it an error in Yosemite OS X, or is it a reserve battery power I did not know about, or is it something completely different
That is your battery it self, acting up.
Following the SMC reset I would recommend a single (one time) deep discharge.
The deep discharge will reset the Battery values reported.
Just leave your computer running till it shuts down by it self due to low power.
