The sleepcover has never caused an issue when running nickel. If I switch to Koreader with sleepcover on I start getting excessive battery drain, but without the cover Koreader battery drain is far more comparable to nickel. With the sleepcover and Koreader I am switching the unit off manually but still I get the excessive drain so it is almost as though the unit is repeatedly coming in and out of suspend. Strange. I do like using Koreader, so for the moment I am changing to a non-magnetic cover and will monitor performance.
Thanks for your ideas.
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