Bumpy.....You're showing your age.....USB ports are everywhere, including coaches. Our new coach has 6-7 of them around the coach. Most of your 12 volt stuff, Ipads, Walkie Talkies, cell phones and many more all come with a common USB port instead of the old bulky 12 volt cigar shaped plug in. Next time you're at an auto parts store, look at the gadgets on their counter. They are USB ports that are incorporated into the old style 12 volt cigar type plug, giving you two ports or 110 volt models giving you two ports.
With USB, there is no longer a need to have a dozen different chargers.
