Can someone tell me what the power figures (amps &/or watts) are for a Skywatcher HEQ5Pro mount when running on 12 volts DC? I'm trying to get all my power requirements sorted so I can design a power pack. I will want to run the mount, dew heaters (15 watts max total), laptop, and some auxillary LED lighting. I couldn't find the info I need in the Skywatcher literature.