Phone battery going flat too quickly
My shiny new-ish Android smart phone usually needs to be put on charge every third night or so, with my normal level of usage.
This week, after the phone ingested a code download (downgrade?) on Monday afternoon, it has been necessary to charge more than once per day. Between yesterday evening and this morning, while the phone was in idle mode, screen off and "power saving mode" set on, it used 46% of the battery in just 15 hours. I checked through the settings and didn't find anything unusual switched on, no GPS activity, no wireless hotspot, no hdmi transmit output, nothing.
This morning I pulled the battery out and put it back. I have used the phone a bit today, browsed via WiFi and checked the battery use a few times and it has only used a further 12% in 13 hours. Problem gone away.
What could have been using so much battery power and not show up in the task manager?
Rans6......