I don't know how the others are but on the Elipsa when it's charging and sleeping it shows the battery level in the box on the left where it says Sleeping. When it's turned off there's no battery status, but that's not a big deal for me since I only turn it off and charge it when the battery is very low and I know I won't be using it soon. I've no idea if anyone has timed the speed difference with charging it sleeping versus off; perhaps it's not significant.
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