I've had my MBP13 for just over 4 years and since around the time of the latest macOS upgrade, the battery life in sleep has suddenly gone down dramatically. I'm now on 10.13.4. Before the upgrade, I could just close my MBP. Days later, the battery would have gone down a few percent but that was it. I could work as usual. Now, though, the battery doesn't last a day in sleep. I fully charge it, close it and the next day, it's dead. I find this highly inconvenient. There was a kernel_task in activity monitor that took a bit of CPU. I rebooted and now it seems like it's behaving better: (top 3 tasks since a reboot day before yesterday) I'm associating this with the upgrade to 10.13.4, but I'm not certain it started exactly at the same time as when I did the upgrade. Anything I can try to bring this back to normal levels? Any more information I can provide you? Thanks.