iPhone-4S and iPhone-4 comparison in case of Battery life

According to reveiws of iLounge, iPhone-4S is not better than iPhone-4 in case of Battery life for 3G and Media.

When the two devices are compared by iLounge, they have found that iPhone-4S came under the device iPhone-4 as shown by the figure above in which they compare the battery life in 3G Data, Wi-Fi, Voice, FaceTime and Video Recording. You can see the results as in the graph above.

They have found that the device working with Verizon and AT&T have almost same battery time i.e. about 5 hours and 54 minutes in case of 3G data while in case of Sprint the battery time is about 5 hours and 23 minutes.
On the whole, the conclusion by iLounge is given in following words,

If you spend much of your day near a Wi-Fi network and only rely upon the iPhone 4S for web browsing and phone calling, you won’t notice a major difference—unless you’re thinking of switching to Sprint, in which case we’d be a little concerned. Similarly, if you use 3G data, plan to record or play videos, or want to listen to hours of audio during the day, you can expect greater battery drain from the iPhone 4S.

Source:
iLounge