From 2004 until 2013, I carried a laptop routinely.
I bought and installed inverters in each vehicle and RV I owned.
I felt it was silly to recharging a battery from a battery, so I avoided such practice in the TT.
In late '13 I bought an iPad and moved certain stuff to a desktop PC. Since the iPad and iPhone recharge from USB ports. No more inverters anywhere!
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!