Deffinately not normal for a Forma. they actually have remarkably good battery life. You either have something that is getting stuck (with the cpu in full use,), or your device is faulty.
My suggestion, as painfully annoying as it will be, is to go to Settings -> Manage Downloads and delete all of the items. Then go to Settings -> Accounts and press sign out button. You will then have to set up the Kobo again as new. Load only the books you are currently reading, and monitor for a few days to see if the abnormal battery drain is gone. If the the battery still lasts for so little time, then seek a replacement, (hopefully on warranty.)
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