[shamanNS]

Similarly pathetic and bad battery life. Sure, KOReader uses some x% more battery than stock Kobo reader. Is that 3%, 5% or 10% more I don't really care since even 10%-15% less of already terrible battery life doesn't matter that much to me. It doesn't change the main fact: Libra 2's battery life is not good for an eInk reader. It is good or even great when compared to a mobile phone or a tablet, but horrible when compared to other non-Android BW eInk devices with same or similar screen size.

Just how pathetic: Whenever I use my Kindle PW5 my Libra 2 is always left for days & weeks sleeping on stock homescreen (actually on "My Books" tab since I use "Sideloaded mode"), so exited out of KOReader... and it manages to drain more battery doing nothing than Kindle after reading 700 screens and being used at least 20 out of 35 days since both readers where last charged.

I've done shorter comparisons (like 1 hour of reading) of reading in stock vs KOReader, and compared battery drain in sleep / standby for 24-48h with KOReader opened and no KOReader and concluded that the difference is not that significant (like on stock sleep drain average for 2-3 days was 2.5% per day and with KOReader opened and then suspended it was 3%). In theory while in sleep/ standby there shouldn't be any difference since KOReader process is also suspended with the device.