Even if the rule fires it won't give the numbers you want (I treid the same thing and Ryan was right)
see post here
HSM won't bug you (or your wife) enough. It is too passive and only updates on a change, not when a battery sits at 1-15% for months.
In the end I used a custom rule for the main devices, and then a custom app called "device monitor" that send daily reports. Still not what I wanted but it will do for now.
