Either I broken my charging chip/batterry or there actually is a bug/incompability in KP51r1. I upgraded in last minute, and nokia default batterry meter shows broken "almost empty", while bnf confirmed it is still 33% full (it perhaps uses i2c method once when run and closes). Seems some new driver version miraclously conflict with bme (and now checked my fool steps and were none). Anyway it seems even faster than before perceptfully. Hope that confused bme wouldn't decide to shutdown. Edit: it shows "calibration needed : 0" and measured batterry capacity changed, but I didn't run the calibration script, could it have calibrated naturally via long charging or it indicates something broken here (it could broke something after me beeing so blunt to allow 50 celsius and not shutdown instantly to prevent overheat). It shows "almost empty" again and again, will ccheck after next reboot.