Recently, the Transportation Security Administration enhanced the security process at some European airports for flights going to the US. As you can read in this statement, you will need to be able to power up any and all of your electronic devices if requested. That means to be sure that you have packed your chargers or extra batteries for your camera, phone, tablet, or whatever 'device' you might lug along with you. Since our flight home does not leave until the late afternoon, also please take care not to overuse the devices once we've left the hotel (and it should go without saying you should have attended to charging them, at least partially BEFORE we check out of the hotel!).
What if you don't? Well, that might be the last time you see that camera or phone of yours.
Don't worry- I'll remind you again when we're in Paris.