Hah! How many USB ports do you now have, total? Including those 8
Ha.

Ya I know. Crazy. But I actually USE these items constantly. USB charging is also super efficient. So many devices can charge from USB including some items I’ve recently dumped their AC adapters after discovering the right USB voltage output runs them more efficiently.
Inverters running AC/DC adapters are wasteful if you can do DC-DC. Otherwise the inverter plug-ins mean you’re going DC car battery...to AC...only to go back to DC via the adapters. USB keeps them native DC...a win.
Two recent examples: -Just figured out my two O2 Cool ventilation fans can use USB>9V plugs. They market AC adapters to bypass batteries, but that means inverters. Turns out only put out 9V and only .7A Maximum...so...a $5 USB to DC plug handles that easily, with no wasted energy of inverting. This saves me from going through 12 expensive D-Cell batteries every few days of camping use, and draws remarkably little power...usually only 0.2A or maybe 0.4 per fan...less than most phones charge at.
-Also discovered my AC adapted lithium battery chargers do fine on USB instead of their AC plugs...so another win, and no need for inverter.
-Two usb-charged lithium head-lamps are always ready (use/deplete one? Just swap it for the 2nd one that’s always plugged in). I use these constantly even at home.
-Two inexpensive speakers mounted in my hatch are kept topped off...mean I can listen to music/news while fiddling or relaxing in camp or tinkering without having to use the stereo power via start button.
-My bike computer is kept topped of and ready.
-My Warn Remote is kept fully charged.
-My hidden extra phone is kept plugged in...meaning I could actively track my truck if stolen, and the thief wouldn’t know it.
-External ISB ports I can use with truck fully locked shut, or friends can use to charge their phones without access to my interior.
-Garmin InReach can be on 24/7 when camping.
-family of passengers can all charge devices.
These lights are used constantly, and my Warn remote is charged & ready.
Topping off the usefulness is finally finding USB sockets that have a USEFUL power display.
** System voltage is useless and most only show that. BUT...I found a model that actually shows you how much power anyththing plugged in is USING. This is killer because it’s a really good indicator of not only whether it’s more drain than you want to leave on...but also a good indicator of how close various items are to full charge, since nearly all modern UB-charged devices taper their draw as they get close to full charge.
**See rear hatch photo of speakers: Left one topping off left speaker, now down to just .1A, right speaker fully charged, so shows general voltage (which 8 never trust this far from the battery...but a ballpark trend indicator). I use my open hatch as a sort of workbench in my driveway A LOT...so these little speakers are perfect.
Anyway... I know it seems crazy/goofy, but it’s amazing how useful USB options are for either always-plugged stuff and quick access stuff.
PS on power use—Since fully-charged items taper their draw to almost zero once fully charged, leaving them plugged in consumes almost no measurable power, so I’ve discovered my batteries do remarkably well.
Somewhere between 0 and 0.1A! Also have the switches to flip if any concern longer term. Compared to my 24/7 fridge/freezer combo...these outlets are electrical Tiddlywinks.
