Thread: Troubleshooting Paperwhite Battery Meter Error
View Single Post
Old 10-21-2012, 04:17 PM   #9
hawhill
Wizard
hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.hawhill ought to be getting tired of karma fortunes by now.
 
hawhill's Avatar
 
Posts: 1,379
Karma: 2155307
Join Date: Nov 2010
Location: Goettingen, Germany
Device: Kindle Paperwhite, Kobo Mini
Quote:
Originally Posted by sirmaru View Post
My meter showed about 50% the night before it dropped to that screen showing the large empty battery and the wire leading to a current on the second cycle.

Obviously the METER is not accurate.
Nope, not necessarily the correct conclusion. Except from a complicated discussion what the battery meter really shows and a lot of physical theory about the workings of a battery, there might be easy explanations for what happened.

I offer an easy one: some process on the Kindle went racy, consuming CPU power, eating your battery until the battery management shuts it down. That's a rather common case and I am really pleased with the firmware quality in that regard. However, firmware will always have bugs in some corner cases.

This aside, most modern gadgets have to learn to know their battery. I.e. they need some more cycles to give really good estimates on the amount of available power left. This is in most cases done by the dedicated battery management hardware (which internally of course uses "software") which keeps track internally of some parameters and reporting a "remaining capacity" and a "current maximum capacity" to the firmware.
hawhill is offline   Reply With Quote