I upgraded to the new firmware last night. I ensured that autosync was disabled. I disabled wifi and then turned backlight to 5% and read for a few minutes. The battery was still in the 97% range when I closed the cover for the night. This morning it was at 57% battery. I did a factory reset and started a battery charge and will wait a few days for official release of the firmware. If this doesn't fix my problem I'm going to get the Kindle Oasis and say goodbye to Kobo.
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