Why does my laptop turn off when running on battery power?

Question

laptops

If the laptop works from the network - everything is fine.
If the laptop is running on battery under a small load, that's fine too.
But as soon as I start to load it (laptop), it abruptly turns off (I hear a click).
Under load means, for example, opening several tabs in the browser.
The battery was changed 2 years ago. Immediately such nonsense began. Changed the battery under warranty - did not help.
Laptop: Dell Inspiron 7110
OS: Win7 x64

Answer 1

Did you calibrate the battery after replacing?