Pretty sure all use around 500, more or less, only difference is on what they are mounted, how fast they charge and if it's one ship only or if it can take multiple ones.
Basically, I have a JD 4 and a pob with a jd and hype survey factory. I'll use the JD4 (on a civilian carrier) to move other ships, but was going to use a Mk 2 or 3 for jumping to resurvey systems and every day use. For that, Charge time and battery use matter.
I know its 60 secs for the Mk2 and 30 for the Mk3, but looking for definitive info on battery use before I decide which to make.