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Originally Posted by thel8elvis
I have only had my Glo since july. Last night, it went from 41% while reading for about 30 minutes, to needed to be charged when I woke up this morning. (I always put it sleep, not off, and wifi is never on)
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It is normal for my Glo to need charging soon after the battery meter reaches the 25-30% mark, and it drops from 100% to 90% very quickly too, but between 90% and 30% I get about 40-45 hours reading time over about 2 weeks. I have had it 10 months and this hasn't changed noticably, though I haven't done a careful test recently.
Quote:
Originally Posted by thel8elvis
I searched the forum, but didn't see any agreed upon methodology for testing battery life. I left the light on for about 8 hours on day, and that hardly made a dent in the battery, just a few percent. So either there is a firmware bug(I'm on 2.8.1), or a problem with the infrared 'touch' sensors, or something else entirely.
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One thing that did cause problems when I first got the Glo was a faulty SD card. It made my battery drain quickly so I only got about 8-10 hours reading time per charge. But that problem disappeared as soon as I replaced the card with another. I haven't seen anyone else report a similar experience though.
The main problem with testing battery life is that it varies greatly depending on exactly how you use the device. I find one minute of using the web browser can use as much battery as an hour or more reading with wifi off. Browsing the library listings uses a lot more power than reading too. In fact, doing anything except reading seems to use a lot more power than reading. The device seems to be optimised for reading. Luckily that is mainly what I use it for.
I did one careful test with my Glo, and others here have done similar, keeping wifi turned off, not plugging in to USB, never powering off, and mainly just reading. Result was about 45 hours reading time over two weeks on one charge. It takes some effort for me to do this sort of test though, as normally I want to do a wifi sync or connect to Calibre more often than once every two weeks, which would mess up the test. (One wifi sync can use as much battery as 2-3 days reading!)