What is the current draw if nothing is connected on the usb end?

Never checked, but very minimal if any draw. I have 2 wired into my tractor, my tractor sits for months on end and the battery is never dead.

What is the tab height and slot width for the screw mount points??

The slot width is about 2mm larger than the usb-c plug and the tab height is about half the usb-c plug width. Note that a standard usb-c plug width is about 8mm.

Can I hook this up to my 12V battery on my motorcycle to charge my phone?

You could, but there's also flexibility installing a 12v cigarette lighter socket (several kits available) so you could get more usage out of it. Going that route, there are cigarette lighter/usb plugs that are easily replaced if it goes bad. If this adapter goes bad you'd have a bit of uninstallation/replacement work to do.

ASIN	B086KTGRH1
Best Sellers Rank	#185,620 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #746 in Power Converters
Customer Reviews	4.3 4.3 out of 5 stars (315)
Date First Available	March 30, 2020
Item Weight	1.41 ounces
Item model number	USB-CONV-F
Manufacturer	Konnected
Product Dimensions	1.81 x 1.06 x 0.55 inches

Konnected 12V to 5V DC USB Type-C Right Angle Step-Down Power Converter, Buck Converter, 15W Output, 3A at 5V USB Type-C Power Supply, Waterproof (12V to 5V USB-C Power Converter)

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