Samsung Galaxy S2 Battery Stamina

Samsung Galaxy S2 (although it is not as cool as the Google's flagship Galaxy Nexus) is a powerful phone. Contrary to the popular belief, its battery stamina is also awesome.

The above screenshot was taken on U.E. 1339636093. The phone was running the stock Gingerbread (2.3.6). As you may see, more than 33% of the battery is left. I remember uninstalling Facebook app the day before. It is noticeable how much Facebook drain battery. It lasted for two full days (see the screenshot below):

After I upgraded it to OTA Stock Ice-cream Sandwich (4.0.3), it is still serving me quite well, although not as much as it did with Gingerbread.

Logged on Doughnut I/O. U.E. 1341927488.