The problem is, if I let the phone just run out of juice, it happens most likely in the middle of the night, so I wont be getting wakeup alarm in the morning and have completely dead battery to start the day with. And if it happens during work day, I'd have to leave my phone charging at my desk an therefor be out of reach some part of my day.

It is curious that the battery calibration flag gets reset after 32 cycles (indeed I now have 33 cycles, so thet is what killed the info), because i've been using the same calibration data for 5 months, and I charge my phone every night, so it should have 150 cycles. Does anyone know what these full cycles consist of, so I can try to avoid them, I'm sure the battery has not reached EDV0 33 times in 5 months.