Originally Posted by Katie1
With WiFi Off how long does the Battery last?
If you leave WiFi off all the time, then you should get 6 hours and 30 minutes of battery life down to zero for the KFHD7-32.
I use the GSam Battery Monitor to make these calculations. WiFi on all the time uses between 5% and 10% of battery energy - NOT the larger percentages commonly believed.
My last cycle with WiFi on all the time went to a full charge at the 19% level and 5 hours and 39 minutes of use.
My present cycle shows 2 hours and 25 minutes of screen time used soaking up 45% of battery energy. My WiFi on all the time has soaked up 10% of battery energy.
My GSam Battery Monitor forecasts that I have 3 hours and 37 minutes left to zero battery energy left. I plan to do a full charge at the 10% to 15% level.
The biggest App user is Media = playing all my MP3 songs while I read, at 8% in this current cycle. System apps use 15% of battery energy in my current cycle. Reading eBooks uses only 1% in my current cycle and my Logos Bible app uses 2%. Every time I wake the KFHD7-32 I notice the GSam battery energy icon in the upper right corner drops 1%.
With this GSam app its easy to glimpse one's hours used and energy left right before one goes to a full charge and then record it in a spreadsheet to know the real battery history.
In contrast the Paperwhite got 10 hours and 29 minutes in its last battery cycle. There I track reading session times on a spreadsheet.