I have the Inspiron 15 7000, 4k touchscreen. I know that 4k takes some juice but the battery life is stiil abnormally low.

2 hours from 100% battery to 0, only running ms word, on lowest brightness and with battery safer on. No other programs running other than lightweight internet pages. My laptop is only 2 months old so dust can't really be the problem. Yet the fan is running most of thr time too, being really noisy in class.

Does anyone have an idea of what is going on or how to fix it?