Why does my laptop battery drain quickly?

Question

Batteries

The laptop turns off at 70% (as indicated by the indicator) battery charge, when there is still about an hour of work left. And it doesn't turn off as planned. Sharp. No data saving. The laptop is less than a year old. From what can this be?

Answer 1

laptop battery calibration + google.com
if it does not help, then to the dump

Answer 2

malfunction of the power supply circuit, failure of the battery, etc.

Answer 3

I came across a similar case when the laptop, after updating the BIOS, turned off without warning on the indicator readings - 70-80%. Replacing the battery did not solve the problem. To know in which direction to dig, you need to know, of course, what preceded the problem.