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Its surprisingly difficult to get these sorts of figures even on the net, so I spent a night playing with my gear and a multimeter prior to heading off to a dark sky site recently. I needed to make sure I had sufficient battery power to get through 2 nights if possible. Some experiments with my gear:
- Laptop with a 4 port unpowered usb hub running everything: 1.8A average
(15" screen, DVD drive - not a baby atom processor lappy)
(USB hub running mount, focuser, QHY9 and autoguider)
- QHY9: 1.4A average (at about 80% cooling which is stacks on most nights)
- HEQ5Pro mount: 0.7A (0.35A parked but on, 1.2 A slewing 800x)
I don't have any dew heaters in my gear sorry. Judging by the time it took me to charge up again afterwards, the draw down figures in amp hours were very close to what the numbers above indicated. Hope it helps a little.
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