Samsung Galaxy S II: battery problems after Jellybean update

Last week, the update to Android 4.1.2 for the Samsung Galaxy S II started. This was enthusiastically received by many users, but now we have more than twenty people received notice that the battery life seriously deteriorated.

Samsung Galaxy S II
the Samsung Galaxy S II was (and is) the --Samsung in 2011 and there are still many users. It is a nice gesture from Samsung for this device, which now goes towards the two years, to provide an update to Android 4.1.2.

Battery Problems
As so often come after the update directly a number of 'complaints' via the info-mail, forum and social media. This weak after a few days usually off and everything seems to work well. In the update of the Samsung Galaxy S II, we get more and more messages within the battery life would be much worse, some even speak of a decrease by 50%. This is not the first time that there are problems with the battery after an update of the Samsung Galaxy S II, this was also the case with the update to Android 4.0.

There are also people who say that it restore to factory settings would help for battery use. Samsung also recommends owners of the Galaxy S II to do this if battery problems after the update. For a more or less mandatory update course this is very strange.
Samsung

we have contacted Samsung this afternoon, there were currently no signals received at our contact, but she would demand it off 'in the organization. “We have not received a reply, but as soon as we know more, we will of course let you know immediately. For now, we are naturally curious if you have the same experience, will shorten the battery after update to Android 4.1.2? You can also select on our Samsung Galaxy S II forum.

Comment Samsung: A factory reset (restore factory settings) would have to solve the problems. However, it is recommended to make a backup, all settings and any files will be lost!