Hi, I have a couple of month old 2015 MacBook 12", which I'm currently using for a couple of hours every few days, not regular daily use. I'm on a cycle count of 7 with a full charge capacity of 5066. Power nap is disabled. I'm concerned that the battery discharge in sleep mode is too high - I put the machine to sleep at 10pm last night with 99% charge. Woke it up at 8pm today and it was down to 91%. Is this normal?