Ok so my new battery arrived from Samsung and would you believe it, its the same battery I already have. Obviously I was skeptical about if this would have any impact on the poor battery life I’ve been experiencing on my Galaxy S2 since the Ice Cream Sandwich update but I gave it a try, which only went to prove my skepticism right.
It made no impact to the battery life. So instead I have monitored my phone for a while and found that the sudden battery drain is intermittent. At some point the
Android OS doesn’t go to sleep properly and it appears to be related to the Wi-fi and/or a data connection. Today for example, I had my Wi-fi on all morning and there was no issue with the Android OS only keeping alive for about 25% of the total time since charge. Yesterday however, my battery lasted until about 2pm and the keep alive time of Android OS was about 80-90% of the total time since charge.
Samsung have now asked me to do a factory reset, which I always hate doing as no matter how many backups you do there is always some setting lost somewhere. If anyone else has any thoughts, experiences or if you are having the same problems then please leave a comment below. It would be great to hear the experiences of others (and from my visitor figures it appears a lot of people are having the same problems).