Well, it's hard to predict based on less than 2 hours, but if my math is right..... And assuming the same very limited use: 8% of battery at 1 hr 49 minutes equates to more than 21 hours. I'm not sure you can expect much more than that. The fact that Android OS is so high as a percentage is, I think, a reflection of the fact that you didn't do much with the phone. All the percentages must add up to 100, so if the screen and the apps don't use much battery, the OS HAS to use a greater percentage of the total. I'd suggest to get a better feel for what's really going on you charge the phone again, then use the phone normally until the battery gets down to 50% or so, and let's take a look at these stats again.
That said, there are two things that strike me as odd. I'm not sure why WiFi is using so much. In the screen shots, you're not connected to WiFi. Are you leaving WiFi on when it's not connecting to anything? If so, that will use a lot of battery. Make sure WiFi is turned off when you're not using it. Sprint has a feature called Connection optimizer, which constantly searches for WiFi connections. If you're on Sprint, or your carrier has a similar feature, make sure that's turned off.
The other thing that seems odd is the Stay Awake time for the OS. First, it doesn't match the Awake time shown on the graph page (your last screen shown). And the awake time is virtually the same as total time on battery. I'm wondering if that's related to the WiFi, too, but don't really know.
If the WiFi and OS Waketime still seem very high after a longer period of normal use, I'd install he program Wakelock Detector, and see what's keeping the phone awake. Better Battery Stats is actually better and provide more detailed info, but start with WD, since it's free.
Facebook
Twitter
Instagram