If I remember correctly to store batteries they should be at 30%
Since there is an exception to every rule, there is a time frame where you don't really need to be concerned about this.
I have NO idea what that time frame is, however I'd speculate that 8 days is within that time frame and you'll be perfectly fine.
My recommendation is to NOT take my word for it but maybe see what
@Mooch has to say about it.