Quote:
Originally Posted by jswinden
We've told you before that you should NEVER allow a Lithium Ion or Lithium Polymer battery to completely discharge. Doing so can cause physical damage inside the battery and might result in the battery being unable to recharge. To be safe, I would not discharge a Lithium battery below 20%.
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My 2nd Kindle Fire 1st Gen has been used down to 15% and many times down to 10%. There I have the GSam Battery Monitor in the top right corner giving me the exact percentage all the time. In addition, it generates a warning on my screen at the 10% level in addition to the warning generated by the Fire at the 15% level.
The GSam android program shows that I usually get about 5 hours and 15 minutes at the 15% level (sometimes less if I'm using their web browser).
Unfortunately, the Paperwhite has no equivalent meter. However, I've set up a spreadsheet to chart my reading times by sessions and cumulative for the Paperwhite. The Paperwhite also does not have a warning indicator like the Kindle Kbd WiFi 3rd Gen and the Fire 1st Gen.
I'll let this next battery cycle go until empty and then will have an accurate cumulative reading time for the PW battery. After that I'll charge at an accurate 15% level.
Since I only read at home and my PC is always on, it will be a simple task to chart the reading time on the PC in an Excel spreadsheet.
Hopefully, in time someone will introduce an active content exact percent battery meter for the PW. The graphic meter now on the PW is very INEXACT as was proven from my last involuntary shutdown.