Um 6 hr usage may not be too bad actually. Depending on type of usage. You need to look at the specs and do the math to figure out where you are. And there is no "number of resets" to fix it. Only if the failed update or hung app etc will the reset solve anything. Here are your specs:
◾Talk time: Up to 8 hours on 3G
◾Standby time: Up to 225 hours
◾Internet use: Up to 8 hours on 3G, up to 8 hours on LTE, up to 10 hours on Wi-Fi
◾Video playback: Up to 10 hours
◾Audio playback: Up to 40 hours
Take your usage types and divide by the specs and you will get a since of where you should be for MAX apple specification. Example using 4s specs:
(200hr std by on 4s, and 7.5 avg wifi and 3g data mix)
Reported standings:
6 hr 45 min stby
1 hr 31 min use
75% remaining
so based on those figures 6.75/200=.033 or 3% used for stdby, 1.5/7.5 wifi /3g mix = .2 or 20%, so 100%- (3+20)= 76% remaining
In this case the phones reported 75% and the remaining that % based on the math is almost the exact so this user was getting right at the max Apple spec.