Maximum number of 5volt devices?

I have 5 water sensors and 2 temperature/humidity sensors.

Can the pro board handle all 7 simultaneously?

I was also planning on getting the battery backup. Can the 5volt usb to barrel connector provide power to all 7 of these?

(and the reCAPTCHA on my Win10 chrome system is in an iframe that i have to scroll around to see the images)

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