https://www.target.com/s/battery+powered+outdoor+fan
Discover battery-powered outdoor fans designed for portability and convenience. Choose from cordless, rechargeable, and quiet options, featuring various sizes...
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https://www.cnx-software.com/2012/12/28/gechic-on-lap-monitor-2501m-portable-battery-powered-display/?amp=1
Gechic is a relatively new company offering what it calls "On-Lap monitors", i.e. light weight monitors that you can easily carry around. One of those
portable battery poweredgechiclapmonitordisplay