Tuesday, December 30, 2008

Power Drain

The E72 battery driver functions do not deliver drain and temperature, but the backup battery voltage is reported. The measured drain (amperemeter) is (rough values):
  • 60 mA display visible - no keyboard lights
  • 90 mA lowest Light - with keyboard lights
  • 110 mA more
  • 120 mA normal
  • 130 mA high
  • 150 mA highest
  • BT creates peaks ~ 10 mA on top roughly once per second
  • WiFi creates peaks ~60 mA similar rate as above
  • power off still drains the battery to charge the backup battery but only a few µA (micro Ampere)

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