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On my Kobo Forma, a battery drain problem started to happen.
I don't remember when the device was updated. And I did not use it for a while.
Battery was draining %10 per hour while the device is on sleep mode, wifi off, auto sync off.
I tried everything. All my Kobo books are archived. I use dedrmed epub versions of them, so I can manage all my books from different sources from Calibre. I unarchived a single book on my Kobo account, and did factory reset on my device. Device synced this single book only. But the problem was not solved.
Then I downgraded to 4.34.20097. For now it seems like the problem is solved. I hope it stays that way. I will not enable wifi, because it automatically downloads the update and installs it on the next restart. I found a patch to disable this, but I don't want to modify the system, and I don't need to sync anyway.
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