Do mods that require you to "hold fire to charge for additional electrical damage" work in VATS using the full charge or no charge?

I've seen mods on a couple weapons, such as the gamma gun, that add electrical damage which only works if you hold "fire" for a few seconds until it charges.

I'm a VATS player and I'm wondering if anyone has done the analysis to figure out how this impacts shots taken using VATS. Anyone?