I'm not willing to say definitively that this is a Fusion issue, but so far it seems like my mid 2013 MBA i7 drains the battery to 0% while in sleep overnight only while a VM is running. On the Apple forums it seems like some are having this issue with Parallels as well.
I am using Fusion 6.0.2. Support information is attached.
Anyone else having this issue? Any workarounds or solutions?
Thanks,
John