[Aardman]

My wife and I both got brand new Kobo Clara HD readers for Christmas this year.

I set both of them up at the same time.

Mine I loaded with most of the contents of my Calibre library - a collection of a few thousand ebooks. Hers I loaded a decent selection of her favorite authors.

Mine I read every night, for about 30 - 45 minutes. Hers she's read a few pages into the intro of one book and it's sat asleep ever since (she's reading a hardback book right now so isn't using her Kobo yet).

Her battery is still full.

My battery drains entirely in a matter of 3 days. Every evening when I open it the battery indicator is significantly lower. Hers, days go by, open it up, battery is still full.

We both have exactly the same style sleep covers, just different colors.

I don't run the screen all that bright, and I've turned off WiFi.

Wife claims it has to be because I have way more books on mine (it's about 2/3 full) but I don't buy that because that's just storage which I wouldn't think drains a battery.

I also refuse to accept the modest daily usage I put it through would cause that much battery drain either, and if it did, I would expect to see it while I'm reading, not the next day after it's been sleeping.

I do have several books "open" at the same time, books that are different percentages completed, but why would that have any impact?

Oh yes, both have the latest firmware.

I'm genuinely puzzled.