78 to 71 in another 24 hours, so it's about 6-7% per day, in average. During this time, I used the reader for 5 mins per day and then left it in sleep mode. I think I will continue that a day or two since I don't have any time for reading. It's Vappu here (1st of May), good time for getting drunk
Later: 71% to 57% in about 48 hours of sleep (the average tends to 6-7% per day)