Windows xp battery meter not updating
There was no battery warning from Windows—in fact, you recently checked and Windows said you had 30% battery power left. Even if you treat your laptop’s battery properly, its capacity will decrease over time.
Its built-in power meter estimates how much juice available and how much time on battery you have left—but it can sometimes give you incorrect estimates.
The battery’s power meter will see how long the battery actually lasts and get a much more accurate idea of how much capacity the battery has left.
Some laptop manufacturers include utilities that will calibrate the battery for you.
Calibrating the battery won’t give you longer battery life, but it will give you more accurate estimates of how much battery power your device has left.
No matter how well you take care of the battery, its capacity will still decrease as a result of unavoidable factors like typical usage, age, and heat.
It may not be necessary on some newer devices, however.