I was using the phone without any battery saving features activated and as expected, having it run the battery down early in the evening. One night I notice I have about 20% battery left so I plug in the charger. Usually I don't notice but this time I am looking at it and it says the battery is 40% charged. ??? Next night I again run the battery down but this time instead of plugging in the charger, I power it off and re-start it. When I powered it off, it said I had 40% battery left. When I powered it up, the battery reading was 70%. The battery dischage indicator seems to be lying about how much battery charge is left. Anyone seen anything like this?