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Originally Posted by HarryT
Of course it is - the operating system. Turning the Reader "off" doesn't actually turn it off; it just blanks the screen and disables most of the buttons. The operating system is still running, doing things like updating the clock, waiting to see if you've pressed the power button, and so on. It's like putting a notebook computer into "Standby" mode. It still needs battery power, although a lot less than when it's turned on.
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I know that Harry.
But still....let's calculate something:
Battery: 1150mAh /2 (2 bars down)= 575mAh. If the Reader last 7500 pages or let's be on the save side. We make it 3750. So 3750/2= 1875 pages for 2 bars.
575/1875=0.31mA per page. He flipped in two weeks 9 pages=9*0.31mA=2.79mA. 575-2.79mA=572.21mA. Let's be really save and take 50mAh off just for 2 times startup etc.That will give you 522.21mA left.
Are you still with me?
So 2 weeks is 336 hours. 336/522.21= 0.64mA per hour. According to the data sheets the CPU uses 35uA in standby. So 0.64mA is 18 times more then what it should be. I smell a firmware upgrade.
But seriously, I'm still planning to measure the standby current and the rest of the conditions like on, flip page, SD card etc.
