My samsung galaxy S II I9100 android version 4.1.2 date of purchase: 28 oct 2011 First of all my battery life is very low its like just 4 hours is it same for everyone? now my main concern is That sometimes my galaxy s2 shuts down on its own and i have to take out the battery to start it and when i start it it starts with like 1% battery like wtf... whenever my gs2 falls down and the battery comes it no matter how much the battery life it starts again with 1% -.- it's really annoying and now another problem has started whenever i am on My mobile data(3g) after a few minutes the singal bar dissapears and theres a sign of no connectivity like a circle and a line drawn inside it and the phone starts lagging and then the screen flickers and the phone shuts down........ I restart it and BAM No battery at all and if its on 3G again it shuts down It happens till I am on wifi or no mobile network.....
You know this sounds surprisingly like the Brick Bug; check this link ...and see the article here:http://www.droiddog.com/android-blog/2012/07/brick-bug-back-on-the-international-galaxy-s-ii-i91000/
Sounds like your battery's dead. I bought Anker branded ones from Amazon, they are just as good as OEM if you end up replacing it.
