2 ms·I wasn't trying to imply this is a strictly either-or choice. That's why I said primarily.by jarek 15y agoI wasn't trying to imply this is a strictly either-or choice. That's why I said primarily.Terretta 15y agoCarrying it about is a primary use. Arguably the primary use.jarek 15y agoWell, that will depend on the user. In my case, I carry my laptop for probably an hour at most (round trip) and then set it down and use it for 2-3 hours at least.