I have just bought my laptop 2 months back and it was giving me around 5 hours of battery backup up until yesterday. Since i have booted up my laptop today its giving me just a little over 2 hours of battery while doing the same task, web browsing, movies, netflix. So the battery life has effectively cut in half over night. I have tried to check battery setting, background tasks and no luck everything seems normal. Could a virus or corrupted windows be a reason?
You should check for infections. I suugest using at "off-line" checker such as the one supplied with Win10. Type Windows Security in the search box (by the Windows Start icon on the task bar). Then click on Virus & Threat Protection and scan options. Select offline scan. This won't detect all issues but is a good start. Another thing to check is task manager. I hope you are already familiar with this tool. Lastly, since the machine is almost new, it should be under warentee. Call the vendor help line and ask for assistance.