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When I first got the KA1, it had a huge battery drain because the sleep cover didn't always work. I got used to peeking under the cover to make sure the light went out and the reader actually went to sleep. Later firmwares pretty much fixed this issue, but I still have the habit of checking to make sure. With 4.4.9298, the reader has not gone to sleep two or three times, so it might have something to do with that.
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