3 ms·A bit weird as it says nothing about battery.by tuananh 12y agoA bit weird as it says nothing about battery.miahi 12y agoIt does say "52 WHr, 4-Cell Battery (integrated)" in the details ("Also included in this system"), but it doesn't list the estimated run time.tuananh 12y agoThanks. I didn't go into detail page. That's why