That's really strange. Because most/all modern systems build statistics about your battery as it charges and drains, to predict the life left. Without those sta

That's really strange. Because most/all modern systems build statistics about your battery as it charges and drains, to predict the life left. Without those statistics they'd have no idea how long it will last because it changes over the life of the battery. In Linux you can even see pretty graphs showing "confidence" for each percentage of battery vs "how confident" Linux is of remaining power. https://www.makeuseof.com/wp-content/uploads/2012/02/power_statistics_laptop_battery_history.jpg https://www.makeuseof.com/wp-content/uploads/2012/02/power_s... My Samsung Android phone shuts down at 5-7% battery life. And the battery dies much faster these days. But it's never "inaccurate." It doesn't jump from 50% to 2% over a course of five minutes. Other than something else being wrong with your OS, my only guess there would be the battery got bad so quickly the OS hasn't adapted to the new life cycle yet by removing enough of the old datapoints.