Posted in the 3.1.2 thread about this. But would be keen to hear peoples reports on improvements in battery time since the update. Obviously this is too early to tell. But if everyone could report their findings here as they use 3.1.2. Just to summarise, perhaps the erratic battery draining is to do with the phone searching for cellular network coverage. This would certainly explain me having very little battery after a day on one occasion and almost full battery on other occasions with similar usage. This is just my take on things. Like I said if people could post their findings if/as they find any difference.