Originally Posted by Mrs_Often
Thanks for that. I really hope you're right. It has had a few cycles already, but then again, those cycles were messed up with the bad kepub.
That won't matter. Calibration for Li-Ion batteries is simply two or three complete discharge/recharge cycles. All it is doing is calibrating the the fully charged and discharged voltages. Unless Kobo has out much more intelligent battery management software in the device than most laptops have, the charge level is simply a linear scale over the difference.
It doesn't matter how the discharge happens. The bad epub will just have drained the battery quicker which is handy when doing the calibration.