Quote:
Originally Posted by Ashjuk
Is this something you do manually or is there some bit of information built into the 650 that I have missed. 
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Manually. I record the date each time I charge it in a spreadsheet.
I do this for all my devices that use LiOn batteries, it helps to see if theres any change in the charging pattern over time, (if the battery is wearing out/reaching it's 'end of life'/is faulty) if I'm having to charge them more often, and how my use of the device affects it's charging cycle.
It showed me the best charging cycle for my 650 was to power off during reading sessions, rather than put it in standby. The charge lasts longer and I dont have to charge it as much (50% less than standyby mode, once a month rather than once a fortnight)