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Old 11-20-2011, 03:26 PM   #2
Blossom
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Posts: 18,708
Karma: 26026435
Join Date: Mar 2010
Device: Kobo HD Glo, Kindles, Kindle Fires, Andriod Devices
Quote:
Originally Posted by sirmaru View Post
11/17/2011 7:50 PM

Power consumption for Kindle Fire:

Was able to charge from 23% to 100% in two hours.

Recharge signal is issued at 15%
Capacity from 100% down to 15% = 85%

Hold On/Off Switch:
One Second - Sleep Mode
Five Seconds with Option Showing - Shut Down Mode (Required after using external speaker.)
Twenty Seconds - Reset Mode

Reading for 31 minutes:
Starting time / power level: 11/18/2011 5:43 PM / 100%
Finish time / power level: 11/18/2011 6:14 PM / 93%
Power consumption = 7%

Music for 23 minutes:
Starting time / power level: 11/19/2011 1:09 PM / 76%
Finish time / power level: 11/19/2011 1:32 PM / 73%
Power consumption = 3%

WiFi On (from the Settings) + Tune In App turned on for Sleep Mode -
Start of power down for 14 hours - time / power level: 11/18/2011 6:14 PM / 93%
Finish of power down level for 14 hours - time / power level: 11/19/2011 8:14 AM / 91%
Power consumption = 2%

WiFi On (from the Settings) + Tune In App turned on for Shut Down Mode -
Start of power down for 12 hours - time / power level: 11/19/2011 7:32 PM / 25%
Finish of power down level for 12 hours - time / power level: 11/20/2011 8:19 AM / 30%
Power increase = 5%

Conclusions:
1. Shut down Fire every night.
2. Alternate reading between 4th Gen Fire and 3rd Gen Keyboard each day.

The only suprise was that Shut Down Mode results in an INCREASE of Power in the battery since ALL processes ceased and the battery level could stabilize.
I find sleeping mode uses little to no power consumption. My KF was not used at all yesterday and this morning when I woke it up It still had a near full battery. Used it for an hour watching a little video, reading and surfing and it was down to 80%. Just now woke it up and it's still on 80% I leave WiFi off when not in use. Last Charge was 1:30pm Saturday.
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