GSM - I am from Europe. But there is no doubt, that the QA at Google totally failed at power saving tests, when they made wifi enabled by default in the background.
I also upgraded our Transformer to Android 4, and wondered why the battery was totally flat in the morning, until I found that hidden wifi setting - now battery life is excellent on the transformer. But I would be surprised if less than 90% of transformer-owners, who upgraded, have very bad battery performance, because of this. |