I have read many battery drain issues on this forum and many other forums, I have also contacted Samsung directly regarding the issue. The battery life is good when I'm using the phone, the problem occurs everytime the phone is in standby mode.
I realise that there are two separate issues going on here;
1) The falsely reported cell standby figure, which is not related to the actual battery drain, only the report percentage used for cell standby. This is important because the false report makes it incredibly difficult to pinpoint the cause of an actual battery drain issue, such as in 2) below.
For the false cell standby issue SUroot has kindly set up a petition to send to Samsung in the sticky section of this forum. Please see a fuller explanation and sign here; Cell Standby issue - please sign "petition" for Samsung
2) An actual battery drain whilst in standby mode. I understand this issue does not effect everybody, but it does affect a lot of people.
I have been testing my battery drain each night and the average drop is 6.21% per hour, so 50% drain over the course of an 8 hour period. This is with the phone on my bedside cabinet, whilst in a strong signal area and not using the phone what so ever. So when I am out and about and the signal is rising and falling the drop is even higher.
I know I can turn off features such as data, GPS, Sync, but this is not practical to do every time I put the phone in my pocket. I am only syncing my gmail calender and contacts, nothing else.
When I contacted Samsung regarding the issue, they advised me on optimsed settings, which did not resolve the issue, they followed that up by sending me the following information;
Thank you for contacting Samsung and I have pleasure in providing the following assistance.
We are sorry about the issue you are experiencing with your Samsung Galaxy S III handset.
We are aware of this issue that is affecting some handsets within the UK. We are currently developing a fix for this issue and we will be rolling it out via a firmware update in due course.
We apologise for any inconvenience that this may have caused.
If you require any further assistance, please contact Samsung again and we will be more than happy to help.
Online Support Team
SAMSUNG Customer Support Centre"
So there is a fix coming, I hope. This information was received on the 3rd of August and there has not been a fix as yet. Possibly/hopefully it will come with the predicted imminent arrival of Jelly Bean.
I have been offered advice by some helpful members of this forum and advised to download BetterBatteryStats and cpu spy. I am going to do this and will keep this thread updated and ask for advice on the findings.
With the kind help of the members of this forum, I am determined to get to the bottom of this issue.