In my experience, the USB ports tend to burn out on this sort of power strip. I haven't tried this exact model, so that may not be a risk with this one.

My Sonicare goes at least two weeks without a charge. And you know, you can always use it to brush the old fashioned way :-D

I used Amazon to buy a 220V hair straightener. When I asked here about buying a flat iron, I was flamed.

>>> In my experience, the USB ports tend to burn out on this sort of power strip.

I would also travel with additional power sources. These (cheap) USB chargers are not built alike. Each year, perhaps about 1/4 of my USB chargers stop working during the trip. Also, so claimed "smart" chargers are not smart at all. Many advertise smart to be able to charge above 1A. Many cheap charger either don't do this at all or does it inconsistently. I had more luck with chargers that came with my Samsung phones/tablets. Many of my aftermarket USB chargers bit the dust during the trip.

Also I found need to locate charger at different locations in the room: camera/laptop ok at the desk, but smartphones need to be charged by the bed, etc.

Also, travel with additional adapter in case you forget to take one with you when you move. On each trip, I would find a Europlug-US plug adapter in my hotel room forgotten by the previous guest.

It IS nice to have a handful of adaptors, if possible...

"my camera battery charger "

You don't say which camera but there are third party USB chargers. I got one from RAV on Amazon for my Nikon. Plenty others available for different cameras. It weighs nothing. Not that the OEM charger is heavy. Plugs into the USB charger. Handles two batteries.