We use two five-port USB chargers:
(driving down the road)
(stationary, for long periods and at home)
These power four Apple devices and the TPMS. When charging, Apple devices sit on the doghouse. The 12V sockets there are always powered. For a multi-day trip, I'll leave the 12V charger plugged in. Once settled for a long stay, I swap the cables between 12V and 120V chargers and plug the 120V into a nearby power strip, then tuck the charger underneath the lip of the dash, for neater appearance.
I have two other 12V USB power supplies (links here
) for the motorhome's "computer room." One of the things they power is a set of USB fans (link here
) that cool the devices in the "room." At times I've used these to keep me
cool when using my laptop.
Micro-USB charging cable link here
. Other Anker micro-USB sets are available. I try not to buy a cable less than 2 meters long unless there's a special need. I buy Apple Lightning cables at Wal-Mart. They seem to fail more quickly than micro-USB cables.